Brass fittings

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850Rick

If i was to rip out a bath,and disconect the taps and decided i need to go out to get some thing would i fit a brass end stop on the end with an olive etc to make it safe.This is what they dont tell you at college
 
Make it safe. You just never know. We did an installation in November, I didn't get there till lunchtime. We had to cap a rad off the existing system and the other lad had drained it, shut the lockshield and trv and gone out to the van for something. Come back in to the sound of running water and the old bloke making a fast exit. He'd come in and opened the trv.
 
yes you could do that. if on the other hand you were replacing the bath with another one for instance you could fit isolators to the pipes which would facilitate working on the taps in the future.
 
many people wouldnt but it definately wouldnt hurt to cover your backside. and could save you a huge damage complaint. besides you never know what happens when your out customer may decide to fill the kettle and next thing you know the main has back filled the hot and theres water everywhere. i keep push fits in the tool box close by incase of emergencys or like you say needing to pop out somewhere mid job

on another note well done you for thinking about it before it happend.
 
Class such things as cut and cap no matter how short a time span your insurance co will thank you regards turnpin:rockon2:
 
steveb said:
yes you could do that. if on the other hand you were replacing the bath with another one for instance you could fit isolators to the pipes which would facilitate working on the taps in the future.
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College told us to fit isolation valves on a bath anyway that was part of are assignment.but we went in the from scratch it wasn't a situation ie your on a job do you cap of etc that's something college didn't tell us.we had to fit them to sink and toilet
 
If I had to change a trv in an upstairs bedroom would you drain the whole system,bearing in mind I don't have a freezing kit yet lol
 
850Rick said:
If I had to change a trv in an upstairs bedroom would you drain the whole system,bearing in mind I don't have a freezing kit yet lol
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no if sealed system, drop pressure, isolate rad at l/s and snatch it, have sone towels ready :)
 
Just drain to below the rad your working on. Waste of inhibitor to drain full system if you don't need to
 
dancinplumba said:
no if sealed system, drop pressure, isolate rad at l/s and snatch it, have sone towels ready :)
Click to expand...
So drop pressure on combi ,lock the shield valve and snatch it?lol wow tricky if the valve doesn't come straight off lol
 
If you turn off the valve first its not a problem. Just stick your thumb over it as soon as it pulls free:)
 
Since learning the trade I've noticed a lot of drain of valves on radiators on ground level in pubs bars and houses.i think there a good idea.
 
Do you think thermostatic radiator valves will catch on in the future in every house hold,there expensive just to buy one of them never mind the whole house lol.I was looking at some in b&q the other week and they looked to big and square lol.
 
trv's been round for donkeys, build regs say you have to fit them, can get cheapo's £5
 
Only thing I've snatched is some pushfit elbows on a system that was obviously airlocked at the point where the elbows ere. Released them for a few seconds and they spat and sputtered then woosh. Hurredly put the elbow back on, job done.
I will start snatching other things soon, as long as I have towels and stop ends handy. Will post on here when i do one :)
Wish me luck...
 
Lets us no how you get on.Is snatching just a lazy way of doing things instead of draining down or is it about time and money?
 
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some will use a wet vac instead of towels and to suck water out of rad, but its a ball ache, towels are much lighter :)
 
When part way through a job I don't like to leave customers or apprentices anything they can fiddle with that might have consequences.
 
just remember if you do any snatching, to have everything you need well within reach before starting.
 
Would you snatch even if miss dopolopolas had a 10 thousand pound carpet in the room you was working in
 
I'm sure she won't mind a few nice black marks on her nice £1000 cream carpet :) haha if its a cream carpet don't snatch!
 
All this talk of snatching. You need to appreciate the difference between doing it on a sealed system and an open vented system. Once a sealed system has lost its initial pressure and the water in the system is at atmospheric pressure, the existing water in the system is a vacuum. Unless you introduce air into the system, in theory the water can not be released from the pipes, to see this in action, place a clear straw into a glass of water, hold your thumb over the straw and pull it out, most of the water will remain in the straw until your remove your thumb. The same happens to water in a heating system.

So as long as you don't allow more than one outlet to be open, you can quite easily change a trv on a sealed system, with minimal mess (always protect the surrounding areas though!).

You can not do the same on an open vented system, you need to create a vacuum by bunging the open vent and cold feed at the header tank. Also, never bung the feed and vent to a cylinder, it can cause the cylinder to implode!
 
When snatching a rad valve, slacken the nut on the pipe very slightly & then disconnect the other nut on the tail side (block tail with bit of rag) & turn the valve out towards you & open to check no water coming out before you remove the valve.
 
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