Thermal Expansion

[drtyhands]

Plastic piping expands and contracts with temperature changes.Most plumbers are aware of this.

I am trying to convince a contractor to stop two hole pipe clamping to wood without insulating.

I made a quick reference in my UPC and found only a chart refering to pipe material expansion not sizes of pipe.

I have had to remove drywall to free up ABS that has gotten bound up between wooden obstacles thereby making them harmoniously tick as the steam heated up the pipe.

I am trying to help him learn from my mistake.

Anyone?

[ToUtahNow]

Adam,

Go to the UPC and look at IAPMO IS 5-92e1 Section 313.2. It tells you to allow for ABS to expand and contract and that ABS is suppose to be strapped to support but not rigidly restrained.

Mark

[PLUMBER RICK]

we always double drilled the horizontal holes as this allowed for both plastic expansion and wood shrinkage:D

rick.

[myakka]

I know PVC expands 3/4" in 20' on 100 F rise in temp. I assume ABS would be similar. I'll try to locate the ABS rates.
Mike

[Gene Bickford]

Have him come to my moms house and listen to the tickity tick tick every time the heat comes on.
He can also check out the brand new click flooring I had to replace because the pro's pipe burst.:mad:

[yasudaplumbing]

Are you liable for this job?
If you aren't, all you can do is give your best advice.
Tell him to 2 hole strap it with 30# felt around the pipe.

For me, if I'm not liable for a job, I'll only give my advice once or twice at the most.

It's kinda like convincing someone to use a bidet :D:speechless:

Later you can say "I told you so". tick, tick, tick.............

Tracy

[gear junkie]

What's double drilled?

[yasudaplumbing]

What's double drilled?

Well it depends if you are referring to a porno movie or plumbing.......:D

Actually, I was wondering the same thing myself.

Tracy

[drtyhands]

What's double drilled?
On multi-floored structures the more floors you stacked on walls below the more the plumber had to allow for expansion and compression of the wood on the lower floors.Double drilling is where we would oblong the bored hole so there would be a considerable amount of wood removed above the pipe.

Haven't seen it enforced in years.

[ToUtahNow]

UPC IS5 will give you the expansion rate as well in Table 3.1. I believe it is around 1" per 20' at 80 degrees.

Mark

[yasudaplumbing]

On multi-floored structures the more floors you stacked on walls below the more the plumber had to allow for expansion and compression of the wood on the lower floors.Double drilling is where we would oblong the bored hole so there would be a considerable amount of wood removed above the pipe.

Haven't seen it enforced in years.

Was this a code thing?

Tracy

[drtyhands]

yes it was

[ToUtahNow]

Adam,

This is simple as it is against the Code to not give ABS free movement. It is covered under protection, support and abrasion. Just take a look at IS-5 of the UPC. I tried to do a cut-n-paste for you but the CD is protected. If you need me to FAX it to you let me know.

Mark

[myakka]

Does your code demand expansion joint at specific distances?

[ToUtahNow]

Does your code demand expansion joint at specific distances?

No but it does require offsets.

Mark

[toolaholic]

On ABS are You referring to D.W.V.also?

[PLUMBER RICK]

On ABS are You referring to D.W.V.also?

that should be the only application. dwv = drain waste vent.;)

unless we're talking venting of high efficency gas heaters.

but adams intent was on dwv applications;)

rick.

[All Clear Sewer]

I replumbed my house with CPVC and when you turn on the up-stairs hot water you think theres a wood pecker in the wall :D I didn`t leave enough room for the "Expansion" and I`ve been plumbing 24 years.....rotflmao
Good thing it was my house :D