traderfjp wrote:I'm just about some pipping my little project. I had a custom coil made for my stove and am running it into my boiler to heat a small basement. I need to pipe out the relief valves for the system. I have one for the boiler, one for the storage tank, and one for the hot water heater and one for the domestic coils in my oil fired boiler. That makes a total of 4. I also have one my the stove by that is on the 1st floor. In any event I have a sewage tank and injector pump in the room with all these relief valves. It would be very convenient to pipe them into the vent line of the sewage tank. The vent pipe is 1 1/2" plastic pipe. I don't want to have to cut a tee for each relief valve. Does anyone have any suggestions? Do they make a manifold?
According to code the discharge pipe from a relief valve needs to be open at the drain that collects the discharge water. The pipe also needs to be rated for the temperature of the discharge water. This usually means metal. The drain can be PVC. You can make your own manifold out of PVC tees and pipe as needed. I'm not sure what you mean by the vent line of the sewage tank. Perhaps house plumbing vent lines? If that's it, the answer would be no. It needs to go into a plumbing drain with a trap.