Codes vary but typically you would use a wrapped steel transition riser.
They come in straight risers but the most common is the 90 degree type.
Whoever is selling you the pipe should sell these too. A tip: Do NOT use
pipe dope on the transition joints. You will create a future leak due to the
ABS components which will not tolerate oil based pipe lubricants. Use
Thanks. Also- what is the difference between the yellow polythylene
pipe designed for gas, and garden variety black polythylene pipe? I am
not planning on using the black stuff, but just curious, as the gas
pipe seems more expensive.
There are different ANSI and ASTM requirements for gas than water and or
sewer. Each has component composites unique to itself and different SDR
(standard dimension ratio) standards.
Do NOT use the black polyethylene for gas.
Here's a link that might be helpful for you to see the risers and see what
they look like.
The reason I ask is that a friend used the black stuff underground,
simply using steel insert fittings underground with worm clamps to
interface to the black steel pipe in the garage. I am not planning on
doing this, since it wont be code, but is there really that much hazard
involved if a- It does not leak and b-no one hits it with a shovel
Your friend is a fool and yes, there are multiple "hazards".
From chemical decomposition to expansion and contraction and structural
integrity. In simple terms, let's not put a 15" tire on a 14" rim......Okay?
round peg, square hole.... It doesn't matter how long it takes to break
down! It's the wrong material for the job. Your (friend) should remove the
stuff he installed and replace it with the proper pipe.
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