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Determining Fixture Flow Rate
From: Tye Cooley
Sent: Fri, Sep 18, 2015 at 1:57 pm
To: bill@snowbridgeinc.com
4015-001-XX_SPEC.pdf (271.9 KB)
Good afternoon Bill,
From our phone conversation here is the calculations to determine fixture flow rate for your 3 comp sink.
In this case we have (1) 3 comp sink 14 x 18 x 18 per sink.
14 X 18 X 18 = 4,536 cubic inches
231 cubic inches per 1 gallon
4,536 / 231 = 19.6 gallons
The calculation also states the fill factor of a sink is at 75 % of full sink capacity. Typically a sink is never filled to the
top with water, pots and pans or the drain factor alone keeps from having a full sink capacity.
19.6 X .75 = 14.7 gallons with fill factor for each sink
14.7 X 3 (each sink) = 44.1 total gallons of 3 comp sink
Divide 44.1 by 2 minute drain time
44.1 / 2 = 22.05 total gallon flow or 22.05 GPM
This calculation is sufficient for in determining fixture flow rate under IPC. Please check with your local code as some
jurisdictions have separate plumbing code ordinances.
I have attached our spec for the GB-25. Our GB-25 is certified at 25 GPM with a Lifetime Guarantee.
Let me know if you have any further questions.
Thank you,
Tye Cooley I Customer Service Specialist
tye.cooley@schierproducts.conn I 913-951-3300
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