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You should have started an new thread. don't think you will get any answers here, since the original topic is totally different.

The IPC says 2 FU for a service sink, but it lists a minimum trap size of 1.5". If I have a service sink with a 3" trap, is it still 2 FU, or do I use table 709.2, "Drainage Fixture Units for Fixture Drains or Traps", 3" comes to 5 FU.

On the inlet side of a grease trap that has a 3" inlet, is the only vent that is needed, the one for the flow control device (3/4"), or does the 3" pipe also need a 1.5" vent on it?

Is there a trap primer that can be connected to the CW main, service 2 traps, and work without any electricity? I have floor drains in a water heater room that are basically emergency floor drains, and are not near another sink or fixture.

Where do I get a plumbing vent screen like the one shown in figure 904.6 of the 2009 IPC? It needs to be stainless steel, preferable 316.

Not a vacuum breaker, a vacuum relief valve per IPC 504.2.

ON the side. 15" from the bottom, 75" tall water heater.

How do you size a vacuum relief valve for a bottom fed water heater? Are the calculations, or does it go by the BTU rating of the water heater?

There's no handicapped people where these go. Handicapped people do not go to offshore oil rigs, and these are for the bedrooms.

A lid for the toilet over the seat, like in your house.

Does anyone know of a manufacturer that makes lids for commercial flush valve toilets?

The IPC rates a public washing machine at 3 WSFU for cold and hot water, but this is for a 15 pound capacity machine. I have a 23 pound capacity machine. How many fixture units is that?

I know you need expansion joints if the pipe expands, but do you need them for a 1/8" expansion? You would need them, or a loop for a 1" expansion, but at what amount of expansion do you start to need them for copper pipe?

Electric water heater

What would you do if you had a 1000 gallon water heater that the water is getting too hot in the top of the heater, and tripping the T&P relief valve?

In the load fixture table for the kitchen sink listed at 3 WSFU per sink. Is that 3 WSFU per fixture, or per faucet? I am asking because I have a triple pot sink with (3) HW connections. Is this sink 9 FU or 3FU?

To calculate the GPM capacity of a floor drain, I found the following equation: Q = 448.2 Cd A 2gh where Q = Flow Rate (Gallons per Minute) Cd = Discharge Coefficient (Typically 0.6) A = Open Area of Grate (ft2) g = Acceleration (32.2 ft/s2) h = Head Above the Floor (ft) What is meant by...

The IPC lists a service sink with a miminum trap size of 1 1/2" as being 2 DFU's, but if I have a service sink with a 3" trap do I use table 709.1 and use 2 DFU, or do I use table 709.2 and use it sized per the trap size, and use 5 DFU's?

Should have said, industrial usage.

The only water closet carriers I can find have 4" connections. Are there any with 3" connections?