He can be reached at by email at jbengineer@aol.com. Hence, hot water will come out of the cold water faucet. But that’s a subject of another column. 2: Hot water heater is fine; Replaced the recirculating pump. The stated purpose of this valve is to prevent "thermal cycling", in which the heat differential between the two legs of your recirculating system cause the water to circulate on its own. I have the Grundfos UP-10-16 B5/ATLC which doesn't have an internal check valve like yours does. In this example, hot water may not come out of the faucet until the recirculation pump turns back on. It returns the hot water back to your heater when you close the hot water faucet. Our hot water recirculating system supplies hot water instantly at every faucet or shower. Helping You to Do It Yourself! Basically, hot water rises, so if one side is hotter than the other, the hot water … If a faucet or fixture is opened to only flow the cold water, the hot recirculating water will flow into the cold water. The pump uses the cold-water line to send water back to the water heater! If you think you only need a flow control valve and not a check valve, I can take you to many buildings where the hot water recirculation system failed. There are two types of hot water recirculation pumps available for you to buy. I had an interesting discussion recently about the use of check valves. When you open a faucet, it only draws hot water from the hot outlet of the water heater. When it senses that hot water is returning to the heater, it shuts off the pump. Discussion in 'Plumbing Forum, Professional & DIY Advice' started by jdf405, Feb 2, 2014. jdf405 Electrical Engineer. You should check the specs for your pump. I now do plumbing inspections and what eplumber said on how commercial guys do it is the correct method of connecting recurculating pumps. There is a continuing argument in the plumbing engineering community as to whether the check valve belongs before or after the flow control valve. I want to hear from you. If you are tired of waiting for the hot water to kick on then you need to install this timer operated pump on your water system. Visit our updated, Julius Ballanco: Drinking foundtain or bottle filler, Proposed Illinois plumbing code mandates 160° F water, Julius Ballanco: Legionella and the Plumbing Code, Bonomi S250 Series stainless steel in-line check valves earn NSF 61/372 certification, Following instructions for installing a two-zone system. http://www.taco-hvac.com/uploads/FileLibrary/100-41.pdf, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. However, plumbing water distribution systems are never that simple; rarely does the water always go in the direction we would like. This process saves water, utility costs, and energy and sewer expenses. The recirculation pump is dry and unable to pump hot water until the air is removed and replaced with water. Design, CMS, Hosting & Web Development :: ePublishing, This website requires certain cookies to work and uses other cookies to help you have the best experience. You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. … Another contractor said, “I use positive displacement pumps, so you can eliminate the check valves.”, Being the instigator that I am, I asked, “How many check valves should there be on a hot water recirculation system and where do you install them?”. However, the energy codes no longer allow recirculating pumps to run continuously. For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com. One plumbing contractor commented that most plumbers don’t know how and where to install check valves. In this video, I delve into hot water recirculating pump reviews by going over the details that you will want to know. Without two check valves, the system will not work properly. Norm Hall January 28, 2019 Balancing, Domestic Water Recirculating, Monday Morning Minutes, Pumps, Valves. Hot Water Recirculation Pumps. 2 checks and through the cold inlet. Pump runs, depending on the length and size of the pipe, three to four times an hour for one or two minutes to maintain instant hot water at the faucet. FREE Shipping by Amazon. This Watts Recirculating pump is perfect for older homes in need of a hot water boost. The return loop is full of air and vapor locked with no where for the air to go. Turned off the recirculating pump (and ball valve before and after pump). A hot water recirculation pump provides hot water without wasting water. A timer is used to ensure that the system isn't maintaining the recirculation line when you're away at work or sleeping. 247.66 $ 247. Endless hot water but hot water pressure throughout the house is dramatically reduced -- 25 percent of the water pressure available on the cold side) Plumber No. Happybuy RS15-6 Hot Water Recirculating Pump 110V Circulation Pump 3/4-Inch NPT 3-speed Recirculation Pump 9.5 Gpm for Water Heater System. When water at the faucet cools down, the sensor turns on the pump and shuts it off when hot water arrives. It connects between the hot and cold-water shut-off valves at the farthest sink away from the heater. It comes down to analyzing the pressure differentials that can occur in a piping system. Whenever a zone connects to the main piping in the recirculation system, a check valve is required. An instant hot water recirculating system usually comes with everything you need to install it. The purpose of a hot water recirculator is to make sure that your pipes always have hot water in them. An aqua-stat is mounted to the hot-water pipe. Once you have installed your Instant Hot Water Recirculating System you can locate any issue you are experiencing here and we will walk you through step-by … In that situation, the cold water will still flow in reverse and come out some of the hot water faucets. Check valves make sure that water only goes in the direction of flow we want. By visiting this website, certain cookies have already been set, which you may delete and block. It also helps reduce the fresh water shortage.Wa… A hot water recirculating pump works by keeping the hot water in your pipes readily available. Visit our Customer Support page to find the answers you're looking for. Please click here to continue without javascript.. in Munster, Ind. The prevention of Legionella growth in plumbing systems is a topic on most of our minds. In stock on December 20, 2020. For that matter, what about any water distribution system? That could potentially radiate hot water as well. By closing this message or continuing to use our site, you agree to the use of cookies. Check if electricity is getting to the pump using a voltmeter. It is true that if the pump is always running, you may never need the second check valve. And I will install a check valve to prevent the hot water movement in the wrong direction when the pump is off. What was just described is an installation where two check valves are necessary: one on the cold water supply to the water heater before the connection of the recirculating piping, and the other on the recirculating piping after the last connection of a hot water fixture. For a better experience, please enable JavaScript in your browser before proceeding. Carefully place the sensor on the end of the black wire from the meter onto the terminal block that the wires from the plug connect to first marked "Neu," "Neg," or "-." I'm a real plumber and eplumber is a real plumber. As soon as the pressures equalize, the cold water again begins to flow out of the faucet. The pump runs … His response was very appropriate: “What about single-family dwellings?” Touche! A recirculation pump is an electric impeller-style pump that's installed in the hot water line. Printer Friendly (PDF) Share this Post. A domestic hot water (DHW) recirculation system can do that as well as prevent lukewarm water from being dumped down the drain by bypassing it into the cold water line. A check valve must be installed in the line to ensure hot water only goes in one direction. Where they were once provided as a convenience to clientele, they are now being used as a way to cut costs ar… JavaScript is disabled. This article was originally titled “The direction of flow” in the June 2016 print edition of Plumbing & Mechanical. Joined: Jan 22, 2008 Occupation: Electrical Engineer Location: Los Angeles Area. Wondering what that other cold line runs to. _____ A hot water recirculation system is designed to provide hot water to each of the home’s hot-water taps instantly. Mark, if a master mixing valve does not close off tight at the hot inlet port, you need those 2 "balancing" valves to minimize the amount of hot water going back to the storage. In order for your hot water spout to produce hot water, all of the cold water that has been sitting in the pipe must be pushed out of the way. The conversation regarding check valves all centered around hot water recirculation systems, so let me limit this review to those systems. The Watts Premier 0955801 Sensor Valve Kit for Watts Hot Water Recirculating Pump comes with a sensor valve, two 12 inch supply lines with fittings and two mounting screws. You verified that it's the check valve when you turned off the gate valve just after it, taking the check valve … Have a question or two? Place the sensor on the end of the red wire from the meter onto the terminal labeled "Pos," "Hot," "Live" or "+." The simplistic approach to determining the location of check valves is by examining the direction of flow. Julius Ballanco, P.E., CPD, F-ASPE, is president of J.B. Engineering and Code Consulting, P.C. If a fixture is opened to flow water, the pressure in the line is instantly lowered. Water will take the path of least resistance, and if the line from the bottom of the tank has less resistance than the normal hot, yes, you will need a check valve to prevent diluting the hot with the colder water from the bottom of the tank. By closing this message or continuing to use our site, you agree to the use of cookies. But I’m not going to say how I do it, so as to not offend those who follow the opposite point of view. Comfort Valve Hot Water Circulator PROBLEMs. also called Flo Control Valves (by some brands) have both an internal check valve that prevents un-wanted hot water flow (by convection) until there is a pressure differential in the piping caused by the turn-on of the circulator pump; but if the knob at the top of the valve is in the wrong position the valve could be left stuck wide open. It has 3/4-inch pipe thread connectors, and you place it in the hot water line next to the water heater or near the fixture that needs the hot water. Watts Premier Instant Hot Water Recirculating Pump System with Built-In Timer & WP367010 Sensor Valve for Watts Hot Water Recirculating Pump (0955800), 10 inches, Plain. Check valves in hot water recirc loop. No more waiting for the water to warm up. There's an important step in starting up a new hot water recirculation system that has not been mentioned. They are required to be controlled with a shutdown period. 500800 Hot Water Recirculating Pump Manual Troubleshooting Watts Premier has made it simple for you to find the resolution to your problem. Some plumbing contractors have told me they can eliminate the check valve on the recirculating piping by running the pump 24/7. When and where do we install check valves? In this way, the hot water plumbing pipes remain filled with hot water, and you do not have to wait to use hot water. Then the pump’s small increase in pressure is lost by a hot water demand greater than anticipated. My system uses a Grudfos "UP 10-16 BU/ATLC", which has an internal valve. Hot Water Recirculating Systems Hot Water Recirculating Systems. If the water in the piping system always went in that direction, we would never need a check valve. The reason given for having the check valve before the flow control valve is because the flow control valve can be set up with the pressure drop across the check valve already considered. To be clear, I’m only speaking about spring-loaded check valves. In that same situation, if the recirculation pump is off and someone opens the hot water faucet near the intersection, cold water will come out and probably continue to come out of the faucet. ABOUT HOT WATER RECIRCULATING PUMPS There are two main components to an effective hot water recirculating system: the recirculating pump installed on the hot water discharge line of your home’s water heater, and the sensor valve installed on the supply lines of a faucet at the farthest distance from the water heater. A temporary bleed is needed past the outlet of the pump and check valve to vent :wink2. When hot water is needed, the recirculation pump installed at the fixture purges the water line of cold water and diverts it back into the cold water supply. The valve is designed to close and keep the hot water in the pipes once it’s up to temperature. Hence, in a recirculating system, the hot water being pumped through the piping always tends to have a higher pressure than the return line to which it connects. Copyright ©2021. The Watts Premier 0955801 Sensor Valve Kit for Watts Hot Water Recirculating Pump comes with a sensor valve, two 12 inch supply lines with fittings and two mounting screws. I countered with, “Shouldn’t the engineer designing the system tell the plumbing contractor where the check valves must be installed?”. Now, that doesn’t mean that you’ll have hot water circulating 24 hours a day through that line. The other problem is you could have an overwhelming demand for hot water in the piping system. Simple to install, you will not require additional pumps for your hot water line. Simple to install, you will not require additional pumps for your hot water line. Installing a new check valve and recirculating pump - YouTube Protect the Earth – and your water bill in 2019 by saving up to 15,000 gallons of water – plus extra money on your heating bill! Note that many recirculating system pumps have internal check valves. In analyzing this piping layout, it was easy to see where check valves were needed by looking at the direction of flow and possible direction of flow. 66. This pump be placed over the boiler will circulate the hot water from the tank to your faucet. According to nearly 100 trade professionals attending the 2006 Southern California PHCC trade show, homeowners with Watts and Grundfos thermostatic valve hot water recirculating pumps experience excessively high monthly gas bills and waiting for cold water. At the furthest point from the boiler, you’ll need a dedicated hot water line that runs back to the tank, creating a perfect hot water loop. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. I always have the check valve installed in the same location in relationship to the flow control valve. A sensor valve acts as a passing guard between the hot and cold water pipes below your faucet. When the pump is on, it's creating enough flow through the return line to keep the check valve open. If you have two water lines intersecting, the flow is always going to go from high pressure to low pressure. This phenomenon doesn’t last long. Without two check valves, the system will not work properly. All Rights Reserved BNP Media. Hot Water in the Cold Pipe If you turn on the cold water and get hit with hot water instead, you may actually have a problem with the bypass valve that’s a part of your hot water recirculation system, rather than the pump itself. The advantage of having hot water on demand coupled with reduced energy costs makes the use of such devices appealing for a number of reasons. Many master (ASSE 1017) thermostatic mixing valves do not close off 100% (Caleffi's 521 and 5231 Series, for example). It is easier to install the check valve when the system is being installed, as opposed to dealing with lawsuits and installing check valves after the building is up and running. By visiting this website, certain cookies have already been set, which you may delete and block. If you run out of pressure, the flow stops. Customer Support . PROFIT-BASED ENGINEERED VS. EFFICIENCY-BASED ENGINEERED . The ideal situation is still to install a check valve on the recirculating piping. Hi all, About 2 years ago I implemented a recirc system in my house that uses a small Taco pump and a third recirc leg. We all know what direction of flow we want in a piping system. When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions, I have always piped a normal WH recirc through the CW supply. However, when you get into larger commercial buildings, there are many zones, hence, many check valves. The reason given for installing the check valve downstream of the flow control valve is to prevent the flow control valve from being subjected to possible swings in pressure or reversals of water flow. What about single-family dwellings? What was just described is an installation where two check valves are necessary: one on the cold water supply to the water heater before the connection of the recirculating piping, and the other on the recirculating piping after the last connection of a hot water fixture. But who wants hot water out of a faucet before they get the cold water? If the recirculation system connects to the cold water supply to the water heater, the water can reverse course and go into the cold water supply. Beyond providing convenience and increased comfort, a recirculation system can save 10,000-15,000 gallons of water each year that would otherwise go down the drain as a homeowner waited for hot water to travel from the water heat heater to the faucet or showerhead. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. One contractor’s opinion was that anytime you have a recirculation system, you need a check valve. A proper design will have a flow control valve installed at the end of the zone to regulate how much water goes through that zone. Today, users don’t want to wait minutes for hot water to arrive at the faucet or shower when they turn it on — they want it in less than 10 seconds. Saves water, time, and money. The immediate reaction is to think of a single-family dwelling with a simple hot water recirculation system. When we get into a more complex system, there may be multiple zones in the hot water distribution system. For years, recirculating pumps have been standard fixtures in quality hotels, gyms and dining establishments, but they are becoming more common in private residential use as well. Easy to install. Pressure is the energy that moves water through the piping. When balancing the system after the installation is complete, the setting of these flow control valves becomes extremely important. Tell me how we can improve. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Pretty simple philosophy. Problem is that you have it on the wrong side of the recirc pump line, so there's no way to put a check valve there that will stop the water from going that direction. Connecting the recirculating system check valve to the system under the sink furthest away allows the system to provide quick hot water all along the line because the hot water is circulating throughout the house. That is because the pressure differentials allow the cold water to flow to the fixture rather than the hot water. I do not like swing checks in plumbing water distribution systems, ever! Getting it to flow in a convection loop is one thing, keeping it from flowing backwards during hot water use is entirely different. Some of the faucet cools down, the hot water recirculation system n't... When we get into larger commercial buildings, there may be multiple zones in the piping.... For the water heater 2, 2014. jdf405 Electrical Engineer, 2008:... Water will come out some of the water heater system Consulting, P.C home. Eplumber said on how commercial guys do it is the energy codes no longer recirculating. To temperature, F-ASPE, is president of J.B. engineering and Code Consulting, P.C demand for hot recirculation... Discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, more... Allow recirculating pumps to run continuously water heater is fine ; Replaced the recirculating piping by running pump. And vapor locked with no where for the water always go in the recirculation system there. Commented that most plumbers don ’ t know how and where to install you... An electric impeller-style pump that 's installed in the recirculation line when you close the hot water system! A convection loop is full of air and vapor locked with no where the! Other cookies to work and uses other cookies to work and uses cookies! Instantly at every faucet or shower those systems most plumbers don ’ t know how where. Into larger commercial buildings, there are many zones, hence, hot water will flow into the water. So let me limit this review to those systems it off when hot water instantly at every or... High pressure to low pressure pipes readily available water to flow out pressure. We would like do plumbing inspections and what eplumber said on how commercial guys do it is correct! Always go in the hot water line http: //www.taco-hvac.com/uploads/FileLibrary/100-41.pdf, VerticalScope Inc. 111... The recirculation line when you open a faucet before they get the cold water pipes below your faucet who hot! Your heater when you 're looking for that has not been mentioned to vent:.! Minutes, pumps, valves or sleeping hot recirculating water will still flow reverse. Of hot water in the wrong direction when the pump and check valve turns on... Some plumbing contractors have told me they can eliminate the check valve review! Instantly lowered system that has not been mentioned for a better experience, please enable JavaScript in your browser proceeding. Water circulating 24 hours a day through that line lost by a hot recirculation! S hot-water taps instantly that moves water through the piping system air to go from high pressure to low.... Is fine ; Replaced the recirculating piping by running the pump happybuy RS15-6 hot water distribution systems ever. Home ’ s opinion was that anytime you have two water lines,. Piping by running the pump is dry and unable to pump hot water recirculating pump Manual Watts..., keeping it from flowing backwards during hot water arrives julius Ballanco, P.E.,,! Sensor valve acts as a passing guard between the hot and cold-water shut-off at. Email webinars @ bnpmedia.com in that situation, the cold water to each of the pump is going... Cold-Water line to send water back to your faucet ” Touche my system uses a Grudfos up. Water without wasting water, please enable JavaScript in your browser before.. In that situation, the sensor turns on the recirculating piping been mentioned energy and sewer expenses work uses... ' started by jdf405, Feb 2, 2014. jdf405 Electrical Engineer be clear, i ’ m only about... Then the pump uses the cold-water line to send water back to your when. By email at jbengineer @ aol.com 2008 Occupation: Electrical Engineer: wink2 the discussion about,. Check valves, the setting of these flow control valve with water growth in plumbing systems is a continuing in! Turns on the recirculating piping plumbing contractors have told me they can the. By examining the direction of flow ” in the June 2016 print of... Older homes in need of a faucet, it shuts off the pump is for... After the installation is complete, the flow control valve, Monday Morning Minutes, pumps valves! Single-Family dwelling with a simple hot water until the air to go an internal check valves is hot water recirculating pump check valve! And shuts it off when hot water to warm up the second check valve before... His response was very appropriate: “ what about any water distribution systems are never that ;! Your hot water recirculating pump 110V Circulation pump 3/4-Inch NPT 3-speed recirculation provides. Allow recirculating pumps to run continuously the system will not work properly systems is a topic most... A check valve to vent: wink2 me they can eliminate the check valve to the pump using a.! Continuing to use our site, you will want to know that hot water recirculating pump check valve s subject. Direction when the pump ’ s hot-water taps instantly Ballanco, P.E., CPD, F-ASPE is. Of a faucet before they get the cold water will still flow in reverse and come out the!, Professional & DIY Advice ' started by jdf405, Feb 2, jdf405... Our Customer Support page to find the resolution to your heater when you open a faucet before they get cold. Have internal check valves, the cold water pipes below your faucet the resolution to your problem dwelling a...: hot water recirculation systems, ever it senses that hot water arrives hot... Pump Manual Troubleshooting Watts Premier has made it simple for you to buy are many zones,,... Your faucet out some of the faucet cools down, the hot and cold-water shut-off valves at the faucet down. Of a hot water in the recirculation pump turns back on the pressure the! Costs, and more pump 110V Circulation pump 3/4-Inch NPT 3-speed recirculation pump is.... 'Plumbing Forum, Professional & DIY Advice ' started by jdf405, Feb 2, jdf405. Checks in plumbing water distribution systems, so let me limit this review to those.... Outlet of the water heater system system supplies hot water faucets was very:! That water only goes in the line is instantly lowered moves water through the piping system valves all around. Usually comes with everything you need a check valve open Los Angeles Area dedicated to do it is correct. Is entirely different sewer expenses will still flow in a piping system that... Very appropriate: “ what about single-family dwellings? ” Touche system usually comes everything! M5V 2H1, Canada once it ’ s small increase in pressure is the method! Don ’ t know how and where to install it this website, certain cookies have been. Is entirely different delve into hot water line water through the return loop one. Only goes in the hot water faucet not been mentioned growth in plumbing water distribution system let. A new hot water recirculation system readily available home improvement enthusiasts doesn ’ t know and! Recirculating piping by running the pump 24/7 zone connects to the use of cookies it for., reviews, accessories, classifieds, and energy and sewer expenses t know how and where to it... Pump hot water from the heater return loop is full of air and vapor locked with where... To run continuously examining the direction of flow we want in a convection loop is one,... By jdf405, Feb 2, 2014. jdf405 Electrical Engineer location: Los Angeles Area, Ontario M5V... By visiting this website, certain cookies to help you have two water lines,. Started by jdf405, Feb 2, 2014. jdf405 Electrical Engineer location: Los Area. Pumps available for you to find the answers you 're away at work or sleeping recirculating pump 500800 hot distribution. Or after the flow stops eplumber said on how commercial guys do it is correct. Only speaking about spring-loaded check valves make sure that water only goes the... Already been set, which you may delete and block water in them pump 24/7 the water heater system hot! When you 're away at work or sleeping 2, 2014. jdf405 Electrical Engineer:... //Www.Taco-Hvac.Com/Uploads/Filelibrary/100-41.Pdf, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, 2H1. This example, hot water recirculation pumps available for you to find the answers you looking. ’ t know how and where to install it the setting of these control. Becomes extremely important system, a check valve or shower print edition of &. To close and keep the check valve open, so let me limit this review to those systems lines! Most plumbers don ’ t mean that you will want to know plumbing systems is a continuing argument in recirculation... Discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds and... Minutes, pumps, valves sure that water only goes in the line is lowered..., plumbing water distribution system than anticipated faucet, it shuts off the pump is on it! Flow the cold water pipes below your faucet or continuing to use our site, you agree to the of. Details that you ’ ll have hot water recirculating, Monday Morning Minutes, pumps valves. We all know what direction of flow we want DIY Advice ' started by jdf405, Feb 2 2014.... The fixture rather than the hot and cold-water shut-off valves at the sink... A Grudfos `` up 10-16 BU/ATLC '', which you may delete and block connects between the hot water pump... About tools, projects, builds, styles, scales, reviews, accessories, classifieds, energy.