Pipe Dope and Fittings Not Dry

Over 698,000 strictly plumbing related posts

Plumbing education, information, advice, help and suggestions are provided by some of the most experienced plumbers who wish to "give back" to society. Since 1996 we have been the best online (strictly) PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't tract you. We absolutely do not sell your personal information. We are made possible by:

Post New

How to Show Images

Newest Subjects

Pipe Dope and Fittings Not Dry

Author: jdbs3

I'm replacing a boiler drain with a gate valve with one that has a ball valve. I will isolate the boiler by first closing ball valves on the return and supply side of the boiler (yes they will also be replaced after this boiler drain). I may or may not need to replace the nipple between the boiler and the current boiler drain.

Two questions:

- Will closing these 2 gate valves cause a vacuum such that minimal to no water will come out when I remove the old boiler drain? I hope so, so I don't need to drain the whole boiler.

- If not, then can pipe dope be used in the presence of water when I am switching out the boiler drain, and possibly nipple? It might need to be a quick change to lose minimal water from the boiler.

Thanks

Post Reply

Re: Pipe Dope and Fittings Not Dry
Author: packy (MA) 1) to an extent the water will stop.. 2) yes..
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:

Plbg Advisor List Common Plumbing Terms Find A Plumber Plumbing Manufacturers Directory theplumber.com

Special thanks to our sponsor:

to FAQ's - to popular subjects - to plumbing books - to Tankless 101 - to plumbing history - to helping charities - to contact us