It’s OK The discharge pipe is open to atmosphere so it’s not under much pressure.
thanks mike
Ok heres one. If you have two water heaters with common TPR drain line (like I usually see on four plex apartmets) what is the mininum size of the drain line?
Piping with 1 1/16 ID. or there abouts.
UPC 608.5 states
Drain size must be at least same size as outlet of valve
Yes the code does say that, but there is a provision to that somewhere. I still am looking for it.
Before you start quoting UPC or any other code, verify what code and what version that area uses.
It **can **have a gravity drain if it is below grade! Terminate it within 6" of floor.
Ken;
yes it can but that was a quote from Code Check verbatim… and in my area most basement’s have the TPR off the side with a cpvc pipe the terminates 6" off the ground directly beside the tank, some even happen to fall with luck very close to the sump holw and terminate over the hole with piping.
I have not done a tankless as of yet so I’m looking forward to seeing on in action, there not very popular here yet and I have no gas at my home area so I am stuck with Electric or oil.
It will be fine, it does not have to hold pressure, just drain.
Sorry Dan, didnt mean to confuse you or anything like that. I will have the code word per word available for you the next time.
What I’m saying is someone uses code referrals in a report they need to know exactly what code is applicable in their area and what year version.
The final thing to consider is any local B.O. can exclude or alter the code to suit their own area. Make sure you know this before you talk code to a client.
Otherwise it can be used against you to cast doubt on the accuracy of your entire report.
Kenneth, I thought the 45 degree elbows counted to the max of 4 elbows in line rule.
William, I need some help with the information you posted about 4 elbows and 30 feet max rule. Where did you get this? The UPC. I have a set up with 4 elbows and amd many 45’s
Not to dig up an old thread, but I see this is indeed the code for California,
but I was recently asked why so many discharge pipes are seen inside.
So looking up Los Angeles plan checks, last updated 2014,
So apparently the city either didn’t adopt the code, or never changed their verbiage.
thats what I thought. it has to drain straight down right?
No, it just has to continue downward and cannot go upward…among other things.
oh ok. so it cant be level horizontally either, has to slope down?
Yes… … …
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You cannot combine TPR discharge pipes, they must all be separate. They can all discharge to the same location.
“be piped independently of other equipment drains, water heater pans, or relief valve discharge piping to the point of discharge.”