JG Speedefit & copper

[rocketmanbkk]

Dear Friends

I want to do some practice with JG speedfit, cutting, jointing etc.

Can you help me please?

I see that there are 2 pipe inserts, normal and a more expensive insert with rubber. Are the more expensive fittings worth it?

When cutting the pipe, do you ned to cut only on the lines or can you cut anywhere?

Also, do you need a special connector from plastic to copper? Or is it just say a normal elbow as an example? If you do need a fitting, what are they called

Lastly (I think) do you need, in your experience, any jointing compunds or are the fittings as good aI have been told and when tight are really sound?

I see the pipe is so much cheaper than copper!!

Any other tips of the trade when using this pipe?

All advice and comments welcome as usual.

Kind regards

 

[PlumbBobBob]

hi the lines are there so that when you cut it on a line they are used as a depth gauge when using pushfit fittings i.e fully home when the next line comes level with the fitting. you can use either insert although only the non rubber ones for brass compression fittings as they are too long and pipes likely to blow out. no special connector needed for copper to plastic you don't need inserts for copper either. you don't need any jointing compounds for plastic. don't cut plastic with anything but proper cutter you need a straight clean cut (no hacksaws etc.).

 

[SimonG]

No hacksaw on the copper either, pipe slice and a lick. Had to redo kitchen fitters work, after he used copper pipe, speedfitfittings and a hacksaw. Not pretty.

 

[GasmanxxxR1]

You dont need to cut on the line

The new hep has fittings and inserts that 'rumble' when the pipe is fully pushed home into the fitting and turned round so you know its fully home

 

[Simon F]

if you don't cut to the line its useful to hold the pipe against the fitting and mark with felt pen where you will finish, then when the connections made your not left unsure if its fully pushed in.

 

[AWheating]

dont solder any copper fitting within 600mm as the heat can damage the plastic

clip every 300-500mm (alot more clips required compared to copper)

use plastic under floors and out of site but convert back to copper when coming out of floor or wall, looks neater, stronger, less movement etc.....

keep plastics 2m min away from boiler connections to avoid heat damage.

use tracing tape inside walls to help metal detectors pic up pipe positions after plastering, other trades/home owner is less likely to drill through it.

dont use plastic for a vent pipe of a cylinder

sillicone grease can be used on o rings to aid easy installation, but be careful as adding grease means a higher risk of dirt/dust causing a leak.

keep fittings in bags and clean, dirt and dust between oring and pipe is not good.

above all follow manufactures installation instructions.

 

[pipeline]

just wondering why plastic shouldnt be used for a vent pipe off cylinder... thanks

 

[rocketmanbkk]

Thank you all so much for your advice and comments, pratice will now commence.

Thanks again

Rocket

 

[AWheating]

just wondering why plastic shouldnt be used for a vent pipe off cylinder... thanks

high temps. Although some plastic push fit pipe can take high temps its only for very short periods, a vent is designed to take expansion water which is normally very hot especially in fault conditions. The other reason is that its sometimes hard to clip a vent pipe in an open loft, plastic pipe its very flexible when hot so would need alotr of clipping/securing.

 

[kay-jay]

dont solder any copper fitting within 600mm as the heat can damage the plastic

clip every 300-500mm (alot more clips required compared to copper)

use plastic under floors and out of site but convert back to copper when coming out of floor or wall, looks neater, stronger, less movement etc.....

keep plastics 2m min away from boiler connections to avoid heat damage.

use tracing tape inside walls to help metal detectors pic up pipe positions after plastering, other trades/home owner is less likely to drill through it.

dont use plastic for a vent pipe of a cylinder

sillicone grease can be used on o rings to aid easy installation, but be careful as adding grease means a higher risk of dirt/dust causing a leak.

keep fittings in bags and clean, dirt and dust between oring and pipe is not good.

above all follow manufactures installation instructions.

Not within 2 meters of boiler

I laughed when i saw this which is why i took pic. Got another which shows daylight around flue as it goes through roof .
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