Multiple appliances discharge into one floor drain.

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PepeLePue

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Have one floor drain in mechanical room. Looking for best ways to organize this. The furnace condensate, water heater T&P, and drain pan all feed into the same drain. I also have a washing machine. I doubt I can get these to all fit, are there some best practices for these situations? I’m thinking of forgoing the drain for washing machine and putting a sensor in the pan. Since high efficiency and it’s not going to be behind closet doors should be easier to monitor. How do I clean up the floor drain though? Do people use zip ties or something? I’m somewhat concerned if I cut back the copper to be 1-1/2” above the drain (air gap) it will spray all over the floor given the other pipes that are in the drain already. Should I put a 3” to 1” reducing fitting as a funnel of some sort?
 

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John Gayewski

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Does you furnace have an upper and lower condensate drain? If so that probably has to stay. The other two upper ones can probably go into a reducer that is piped to the drain.

It's not a basement? If it is then the t&p can just go straight to the floor and doesn't need to be piped to the drain.
 

Jeff H Young

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maybe use a laundry stand pipe for t and p or condensate ? might be too high for the furnace
 

PepeLePue

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maybe use a laundry stand pipe for t and p or condensate ? might be too high for the furnace
Laundry standpipe is too far but that could have been a good idea. I'm thinking may re-route the condensate drain for the furnace and the T&P into a funnel using 3" to 1" reducer coupling.. just not enough space otherwise.
 

Jeff H Young

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Laundry standpipe is too far but that could have been a good idea. I'm thinking may re-route the condensate drain for the furnace and the T&P into a funnel using 3" to 1" reducer coupling.. just not enough space otherwise.
looks like you have a stack right there but if you use that it would need a vent or AAV if permited and possibly a trap primer .
its a bit of work I don t like those crowded floor drains kind of pet peeve wouda been nice to think of that during the build .
 
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