Will my DIY water heater installation pass inspection?
Homeowners guessing at code compliance are left hoping their setup passes city inspection without knowing the underlying red flags. Without clear guidance on specific details like tank orientation or correct air pressure, they are left anxious about whether they will pass a local inspector's visit.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Hiring professional contractorsDid this help you?
- 2Applying for permits and having city inspectors review the workDid this help you?
- 3Seeking peer review on online forumsDid this help you?
- 4Consulting online articles and manufacturer instructionsDid this help you?
- 5Pumping up the tank to match average home water pressureDid this help you?
- 6Asking online forums for identification and code compliance checksDid this help you?
- 7Consulting local contractorsDid this help you?
- 8Leaving the unit at its current height despite recommendationsDid this help you?
- 9Checking the installation manual and local codesDid this help you?
- 10Asking online forums for adviceDid this help you?
- 11Relying on local inspector leniencyDid this help you?
- 12Accepting non-standard installations if they functionDid this help you?
- 13consulting local plumbing codesDid this help you?
- 14inspecting lines manuallyDid this help you?
- 15piping in parallel or in series based on capacity goalsDid this help you?
- 16checking local plumbing codes onlineDid this help you?
- 17consulting online forums for plumbing adviceDid this help you?
- 18Consulting building codes like IPC and UPC to check standpipe height and air gap requirementsDid this help you?
- 19asking for critiques onlineDid this help you?
- 20consulting local city inspectorsDid this help you?
- 21posting photos online for community feedbackDid this help you?
- 22hiring a professional plumber or inspectorDid this help you?
- 23consulting local building code documentationDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“My question is would this matter supplying the house with hot water.”source ↗
“Just wondering if this is safe and if it is a code violation.”source ↗
“My plumber recommends moving this tankless water heater higher up on the wall so it’s farther away from the ground. I’m in Southern California. Based on the photo, is raising it advisable? What concerns would you have with its current height?”source ↗
“I’d politely argue the standpipe is too short and should be a minimum of 18” above the trap weir per IPC and UPC code -and- there isn’t much of an air gap between that smaller pipe and the 2” standpipe which is a cross connection.”source ↗
“Bathtub connects directly into the toilet and the sink does too and then there are 3 90 degree bends”source ↗
“What are the red-flags in this picture that should tell me I should make some changes that might extend the life of plumbing and pass a California inspector's visit?”source ↗
“I was worried about the orientation of the tank before I started based on comments posted on links like those.”source ↗
“The main thing I was worried the most about was the getting the correct air pressure in the tank (not too high or low).”source ↗
“Can someone tell me what the pipes and connections are here? Is it Pex with push to fit or crimp connections on the black elbows? Just trying to figure out what all this is and if it's done correctly.”source ↗
“I'm in FL. I was wondering the same thing. This was done by a licensed company.. and we do have a back-flow valve on in the yard. Do you know what the pipes and connections / connection types are?”source ↗
“I am swapping the location of my sink and toilet which are presently a wet venting system. My drawing is what I want to do. My thought is to keep the toilet wet vented to the sink and do a separate dry vent for the shower which is downstream. Does this look like it would work in Virginia?”source ↗
“Okay how do you do pipe support. What is a vac breaker. Exp tank is supported higher up I know it doesn't look like it. And where should I terminate the T&P.”source ↗
“I'm going to have the city come out and inspect and hopefully it's code compliant.. as we think it should be.”source ↗
“Yes it is wrong. It’s a drain, drains cannot go up.”source ↗
Where this came up
People with this problem also raised
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- 23How to tell if boiler and plumbing installation was done right
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- 7How to figure out correct plumbing and venting requirements for a remodel
- 12Did I install this plumbing right or is it going to leak?