Hi; I have to move a rad fed by 1/2 inch black iron a couple of feet - i can shorten the existing flow & return to do this. I'm proposing to use hemp & paste to remake the dismantled joints - is this the most secure jointing method? GH
Hi; I have to move a rad fed by 1/2 inch black iron a couple of feet - i can shorten the existing flow & return to do this. I'm proposing to use hemp & paste to remake the dismantled joints - is this the most secure jointing method? GH Best by far is the old way, as an alternative use Locktite 55 string
hemp & boswhite... yes the old messy way, i've never had a problem with PTFE, and always ues single wrap to make things easier. I guess your just going to screw in/on a 1/2" to 15mm adaptor then run to rad in 15mm copper or plastic?
Hemp and paste.........used it 13 years ago at college, never been near it since. PTFE works fine for me too
the only thing we used hemp for at college was as a wig, to look like a hippy! Can you still buy the stuff?
Okay, point taken! Gas PTFE with single wrap SpykeBmth? The iron goes straight to the rad valve so thought i'd leave that to match other existing rads in area & possible future erosion from mixing metals. GH PS. Yes, you can still buy hemp - but not at all merchants i guess!!!
Yep, single wrap PTFE, as used for gas, I use it on water all the time! Can see you you'd like to leave tails to match! maybe the older guys would still use hemp, and prefer it, just something i've never used! PTFE - Plumbers Tape For Everything!
Trouble with you guys your frightened to get your hands dirty Spike, started a job this week, that has 200ft of 2" iron branching 2 ways off a 3" riser, Then 5 1" branches to the powrmatic heaters, what would you recommend I use to make joints with. (one wrap)? ps its 6m of the floor.
Trouble with you guys your frightened to get your hands dirty Spike, started a job this week, that has 200ft of 2" iron branching 2 ways off a 3" riser, Then 5 1" branches to the powrmatic heaters, what would you recommend I use to make joints with. (one wrap)? ps its 6m of the floor. Whatever you feel happy with!!! Single wrap PTFE isn't recommended for joints above 2" is it!! I'm pleased I stick to domestic sized pipe! Hope you've head for heights on!!
Whenever I worked on industrial pipework and boiler houses, we always used boss white and hemp for the iron pipework, the only change now would be I would probably use jet blue instead of boss white, Loctite 55 is excellent, but some companies will not pay for it on large jobs because of the cost, although it does save on labour time
ptfe is ok but, if you have to unwind the jount slightly to make the final connection, the joint will leak, whereas with hemp and paste it will be fine.
Interesting comments. Not allowed to use normal Ptfe or boss white and hemp on gas, that leaves one wrap, locktite string or gas jointing compound
good question, does it say suitable for gas on the tin. I wouldn't use it on it's own anyway as there will be too much vibration in the factory.
I havent touched gas for a number of years (Bathroom Installer!) but I remember just using hawk white by itself on the rare occasion I had threaded fittings to make up