Compression reducers

[600rob]

Just removing my old rad valves to replace with new ones.
The existing valves use reducers to accommodate a 10 mm pipe to 15 mm valve body.

The old adapter seems to come in two separate parts with a 10mm olive sandwiched in between

DSC_1025

• 600rob
• 18 Aug 2017

DSC_1026

• 600rob
• 18 Aug 2017

The new ones seem to be a single part without an olive.
http://www.screwfix.com/p/reducing-set-15-10mm/70435

Can anyone tell me if this the screwfix item is the correct part i need to fit the new valves and would /how would i fit an olive in there if required?

 

[terryplumb]

that's the reducer you need ,no olive needed.it does not require one as it compresses directly to pipe/ valve body.

 

[600rob]

Thanks.
Looks like i had a 3 part version fitted previously

http://www.ebay.co.uk/itm/111511444311

I guess the one peice ones are the newer type since the 3 part jobs seem to only be available on ebay

 

[terryplumb]

both do the same thing but the one piece is less fiddly ,and a better design in my opinion.

 

[600rob]

both do the same thing but the one piece is less fiddly ,and a better design in my opinion.

Cheers Terry.
In terms of future work and the potential need to remove the valves for whatever reason, which type do you reckon is less hassle to remove and replace
( for a diy'er)?

I know they'll both have to be cut off but I've been reading that the one piece versions can distort the pipe a fair bit which will also need cutting back in order to get a good seal when refitting new.

With the exception of the olive, the top and bottom section of the existing 3 part ones will come off by hand and the pipe looks okay.....
Im yet to cut off the olive and inspect what sort of shape the pipe is in underneath however.

 

[terryplumb]

if you overtighten either type the pipe gets crushed ,once that happens there is no alternative but to cut off the damaged section ,or replace a section of pipe. a common mistake for diy'ers is using too much force ,thinking the tighter I can make it ,the less likely it is to leak. Quite wrong !

 

[600rob]

Yea true.

Ill see what shape they're in once the olives are off and take it from there.

Thanks for the advice Terry

 

[terryplumb]

your welcome .

 

[600rob]

Would you cut something like this back a little bit to get a section of decent pipe?

DSC_1030

• 600rob
• 19 Aug 2017

DSC_1029

• 600rob
• 19 Aug 2017

 

[kidgreen61]

Would you cut something like this back a little bit to get a section of decent pipe?

DSC_1030

• 600rob
• 19 Aug 2017

DSC_1029

• 600rob
• 19 Aug 2017

Yes, the pipe seems to have been crushed, and may well leak if you try to get an olive on it.

 

[terryplumb]

yes ,cut back to good pipe.

 

[600rob]

Will give it a go.

The existing pipes are burried in concrete with no movement which means ive got no margin for error if i balls this up.

Wish me luck boys

 

[terryplumb]

you can solder a new section of pipe in ,low down near floor level , so it's not really visible , if you have to .are you using a wheel cutter to cut pipe ? miles easier than a hacksaw .

 

[600rob]

Got one of these cheap ones as i hardly ever need to use it. Does an ok job though.

http://www.screwfix.com/p/tube-cutter-3-28mm/49428

 

[Hot&Cold]

Got one of these cheap ones as i hardly ever need to use it. Does an ok job though.

http://www.screwfix.com/p/tube-cutter-3-28mm/49428

Clean it up and take it back for a credit/refund