Does there really have to be a full 6" gap betwen the bottom of the
T&P discharge pipe and the floor?
I don't see the purpose of it.
The instructions that came with the water heater say to leave a 6" air
gap between the temperature and pressure pipe and the floor drain.
The water heater that was first installed in the house was like that
I have a pan under the WH and if the discharge pipe came to within an
inch or two of the pan, I think more of the water would go into the
pan when I lifted the T&P lever. And less on the floor.
Be aware that, if the T&P valve should ever be called on to do what it is
intended to do, what comes out of the pipe is a tremendous blast of boiling
water and steam. Whether it goes into the pan first or directly on the floor
would not matter much. The six inches is intended to ensure that the heater
be vented as rapidly and safely as possible, and also to minimize any
possibility that the water in the heater could ever be contaminated by drain
or ground water. I agree that it is nice to understand the reasons for code
requirements, but if you do not understand the reason that is all the more
reason to comply since there is obviously something you haven't thought of.
Codes are primarily for safety, after all.
michaelcherr had written this in response to
Not entireley code based, but the Rental Registry inspection in my area
mandated that the T&P discharge terminate within 6" of the floor. (ie 6"
most everything else I read states 6" without saying whether that is a min
I do disagree slightly with Don's assertion that water will come rushing
While this can and does happen, the T&P valves I've seen having water come
out, it's only been a trickle.
Don Young wrote:
If a T&P blows due to burner or T-stat malfunction, you'll see hot
water and steam bursting out of that pipe. That's why they want it
terminating close to the floor--so no one gets scalded. But they don't
want it touching the floor in case the heat goes out and it's freezing
in the house. They don't want ice blocking the flow.
On Mon, 21 Sep 2009 17:27:18 +0000,
michaelcherr_at_gmail_dot firstname.lastname@example.org (michaelcherr) wrote:
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.