#1
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I was wondering how you measure the functional flow rate of a homes supply.
When I took my class back in 2011, the instructor taught us to use a measuring cup. To time how long it took to fill X number of cups in X number of minutes. I don't remeber his formula and I have miss placed my note book. Thanks for your help. Scott Mick AmeriSpec Home Inspection Arlington, TX TREC #20452 |
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#2
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16 cups per gallon, how many cups can you fill in 15 seconds x 4................4 in 15 seconds x 4 is 16 cups = 1 gallon per minute, thats if you plan to actually use a single cup to measure.
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#3
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Or you could use a dual pressure gpm set up.
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#4
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It is not a measurement, it is an observation as to functionality.
Functional Flow: A reasonable flow of water supply at the highest and farthest fixture from the building main when another fixture is operated simultaneously.
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#5
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If the residence is on a well a recorded gpm is available at the court house, or by listing agents. I like the formula you gets have posted, do you use this for city water mostly?
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#6
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Listen to Larson,
Go to the furthest bath from the supply, turn on the sink and/or the shower and flush the commode. If you have enough water to wash with while the toilet tank is refilling your ok. ![]() 5144 Atwood Terrace Inverness, FL 34452 352-212-3576
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#7
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Did you by any chance do your training with AHIT? If yes, then the measuring cup thingy was to fill up a 2 cup measuring cup in 7 seconds (pretty much what Jamin said). The reason behind this was to know how many gallons of water went down the drain in X amount of time. Should something happen, you would be able to tell plumber an estimation of how much water was used. Over time, you won't be needing the measuring cup as you will be able to look at the flow and guestimate it. This estimation can help you especially when the house is its own septic system. Where there is a Will there is a Way!
Will Misegades TREC# 10465 RedFish Home Inspections ![]() www.redfishinspections.com Infraspection Institute Certified Infrared Thermographer Level I # 9631 "it's not just about how to turn on and tune the camera to make pretty colored spots!" David A. Andersen, Woodlawn, TN |
#8
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What happens when you have a water economizer fixture and it works fine with low GPM?
14 sec. means a 50% savings, and it is "wrong"? David A. Andersen & Associates Clarksville - Nashville Home Inspector Lic#40 (Retired) ITC Level III Thermographer Cert#1958 Building Science Thermographer Cert#33784 HVAC Certification EPA Cert#2046620 ![]() |
#9
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The idea is that you have all faucets running at 1 gal/min so that you can make a quick calculation of how much water went down the drain. Where there is a Will there is a Way!
Will Misegades TREC# 10465 RedFish Home Inspections ![]() www.redfishinspections.com Infraspection Institute Certified Infrared Thermographer Level I # 9631 "it's not just about how to turn on and tune the camera to make pretty colored spots!" David A. Andersen, Woodlawn, TN |
#10
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I use a simple idea no formula I just open the kitchen sink faucet connect my hose to the washing machine connection and let her rip when I get to the bathroom there needs to be enough volume to get a decent shower and have never had a problem with this
http://www.oklahomathermalinfraredimaging.com/ http://www.freedomexpressinspections.com/ Master HVAC Mechanic Retired Level III Thermographer # 8486 Infraspection Institute CMI Certified Master Inspector Residential/Commercial Inspections Moisture Intrusion Expert Witness 55 years in the Trades Okla State License # 130 580-268-3340 |
#11
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The other reason for turning all faucets on at the same time is to make sure they all drain properly. I've had a few times when everything drained fine when just a coupe faucets were on, but when all were on it backed up.
Where there is a Will there is a Way!
Will Misegades TREC# 10465 RedFish Home Inspections ![]() www.redfishinspections.com Infraspection Institute Certified Infrared Thermographer Level I # 9631 "it's not just about how to turn on and tune the camera to make pretty colored spots!" David A. Andersen, Woodlawn, TN |
#12
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When you restrict flow, even at max pressure the GPM will change... You can't open the valve more than it is rated for. Your not going to fill the cup in the Home Inspector School Standard of time. David A. Andersen & Associates Clarksville - Nashville Home Inspector Lic#40 (Retired) ITC Level III Thermographer Cert#1958 Building Science Thermographer Cert#33784 HVAC Certification EPA Cert#2046620 ![]() |
#13
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Where there is a Will there is a Way!
Will Misegades TREC# 10465 RedFish Home Inspections ![]() www.redfishinspections.com Infraspection Institute Certified Infrared Thermographer Level I # 9631 "it's not just about how to turn on and tune the camera to make pretty colored spots!" David A. Andersen, Woodlawn, TN |
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