Thank you to all the plumbing professionals who offer their advice and expertise
Welcome to Plbg.com

Over 535,000 Posts in over 160k Threads

Thank you for making Plbg.com (aka www.plumbingforum.com) the most popular plumbing information sharing and advice forum. Ask any toilet, sink, faucet, pump, water quality, and plumbing related questions. Please refrain from asking where to purchase a product, business, pricing, or legal questions, for contractor referrals, or any questions not related to plumbing. Keep it all positive and please, no advertising. Please visit our sponsor and the best online plumbing supplier: Buy plumbing supplies online 

Post New
Search
Log In
How to Show Images
Newest Subjects
 Freezing drain pipe
Author: bhdionne (Non-US)

I have a 30ft.run of 3in. abs pipe connecting bathroom to septic tank. It runs pretty well unprotected under the the cottage. Is there a safe way (product)availible to keep this pipe from eventually freezing in extreme cold.Many thanks from the north.

Post Reply

 Re: Freezing drain pipe
Author: Wheelchair (IL)

Normally it should never freeze as nothing should be sitting in that 30 ft run. If you have the proper drop per 10ft, any waste should pass quickly from the house to the septic tank.

How deep is the 3inch ?? pipe in the ground? 3 inch is really not large enough.
Best Wishes

Post Reply

 Re: Freezing drain pipe
Author: Timsplumbing (MA)

You can put two bathroom groups on a 3 inch line. But check the pitch and see if there are any dips in the pipe maybe not enough hangers.

Post Reply

 Re: Freezing drain pipe
Author: packy (MA)

[www.tycothermal.com]

Post Reply

 Re: Freezing drain pipe
Author: Nayman's Drain Services (Non-US)

Packy,
Frostex is not to be used on empty pipe.
I did some inquiring when I first started using it. The Mfr. explicitly told me it is for water piping only, and only if those pipes are full of water.(fire hazard)
What I have found is that if folks would keep their toilets from leaking(flapper valve), there would be way less problems with frozen waste lines. Those lines freeze because the drip never makes it to the tank/sewer and freezes. Drip after drip causes an ice dam in the pipe, and soon the whole thing is frozen solid. Steaming or warm weather seems to be the cure.
Also, if folks would make sure that skirting under their mobile homes is not full of holes, then the wind can't rob the little heat that's under there.

---------------

Post Reply

 Re: Freezing drain pipe
Author: packy (MA)

i never knew that.
i always thought that since frostex is self-regulating that it couldn't get too hot...
thanks for the info.

Post Reply

 Re: Freezing drain pipe
Author: hj (AZ)

Don't let anything leak a continuous small stream of water and it CANNOT freeze.

Post Reply

 Re: Freezing drain pipe
Author: hj (AZ)

quote; How deep is the 3inch ?? pipe in the ground? 3 inch is really not large enough.

3" not large enough? We have thousands of homes with a 3" line to the city main, (or septic tank), as long as they have 3 toilets or fewer.

Post Reply

 Re: Freezing drain pipe
Author: Wheelchair (IL)

I too contacted Frostex a mile back when the product was first introduced and was advised that the produce was used on downspouts, and liquid supply piping. I was also informed that unlike its old competitor, the Frostex product could be double and triple wrapped to ensure a uniform supply of heat to the surface of the piping. I don't know or remember what was said about its underground capabilities and I'm going to have to call them once again.

Thanks for the reminder.
Best Wishes

Post Reply

 Re: Freezing drain pipe
Author: RWP (SD)

The pipe needs to be protected from the freezing temperatures. If it is not now, close in the crawl space from the outside and allow some heat to keep the pipe temperature above 35 F degrees. There is no other sure way to stop the freezing.

- - - - - - - - - -

Retired after 50 years of plumbing and heating.

Post Reply

 Re: Freezing drain pipe
Author: hj (AZ)

If there is no water in the pipe, and the only water that flows through it is in intermittent bursts, what is there to freeze?

Post Reply

 Re: Freezing drain pipe
Author: Nayman's Drain Services (Non-US)

exactly.
it's the constant drip that builds a dam, NOT a full flush.

---------------

Post Reply

 Re: Freezing drain pipe
Author: SMSPlumbing (PA)

You can always wrap the pipe in insulation, and make sure during the colder months that the area under your cottage is protected from wind. If the pipe is pitched correctly, then water should not have standing water in the pipe that will freeze. Also with the pipe protected the heat generated from your septic tank should keep in the inside a little warmer.

Post Reply

 Re: Freezing drain pipe
Author: woliver (IN)

I have an electrical sump pump and just added a water backup sump too. The water backup produces a slow drip outside that freezes the outlet/discharge solid. I can't figure out why and neither can the water backup installer. He put in a new water powered backup and it's leaking too. When you turn off the water supply to the water backup, the leaking stops. Please help/advise. Thanks, Wade

Post Reply

 Re: Freezing drain pipe
Author: SMSPlumbing (PA)

woliver- sounds like you need to take out that one and install a battery back up. No running water there unless the main fails.

Post Reply

 Re: Freezing drain pipe
Author: hj (AZ)

The water control on the water powered pump is leaking, THAT is why it drips.

Post Reply





Please note:
  • Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
  • Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
  • Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
  • Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:




Special thanks to our sponsor:
Buy plumbing supplies online


Copyright© 2015 Plbg.com. All Rights Reserved.