New fittings onto old pipe

[HawkWhiteFinger]

Today I've put some new 22mm ballofix valves onto some old pipework.

They tighten up to what would usually be enough, but if I get a spanner on the fitting, I can still rotate the fitting on the old pipe. I'm aware old pipe appears a touch smaller.

I've dressed the olives in V2 paste, but yet can't test for leaks as the water won't be on for a while.

Is this something others have come across?

 

[Subby]

The pipe is old three quater inch pipe, slightly smaller than 22mm

 

[Belly]

You can get imperial rings to convert to old sizes

 

[HawkWhiteFinger]

Hmmm, interesting, guys.

I've added comp couplings to old pipe before and don't seem to remember any issues.

In the meanwhile, I'll get me some imperial olives in that case.

 

[Subby]

You could try tightening the olive onto the pipe , then removing the nut wrap the olive with ptfe then do up the fitting. Also the plumbers merchants will sell 3/4" olives

 

[HawkWhiteFinger]

You could try tightening the olive onto the pipe , then removing the nut wrap the olive with ptfe then do up the fitting. Also the plumbers merchants will sell 3/4" olives

I've just rang a merchant (who closes about now) and he's talking to me about leadlock, says he doesn't have 3/4 olives. I've dressed the olives in V2, ptfe paste.

 

[Subby]

Use the PTFE to beef up the olive then put the paste on top. then re-assemble for a tight fit.

You're lucky having a merchant that's open on Sunday! All ours close 11-12 on Saturday.

 

[stani]

Use the PTFE to beef up the olive then put the paste on top. then re-assemble for a tight fit.

You're lucky having a merchant that's open on Sunday! All ours close 11-12 on Saturday.

Not that lucky if the merchant doesn't know what 3/4 olives are!

 

[HawkWhiteFinger]

Use the PTFE to beef up the olive then put the paste on top. then re-assemble for a tight fit.

You're lucky having a merchant that's open on Sunday! All ours close 11-12 on Saturday.

Yeah in the past the ptfe paste has worked a treat and probably will this time too, but just hadn't noticed that with use of a tool (so not easily), the fitting could still rotate on the old pipe.

 

[kimbo]

Safer to get the proper fittings, if it goes wrong you will be to blame for not using the correct olives, I always carry a few on the van they are easily obtainable from most good merchants gut if not try bes.

 

[erpkid]

When I come across imperial pipe if I can't remove it I will adapt it if accessible. Heat the end to cherry red then flare it with a 22 mm expander. Slip in a piece of 22 mm solder then you can use standard fittings. Occasionally you will come across imperial copper from one of the periods of shortage. This can be very thin and so not the best candidate for flaring.

 

[HawkWhiteFinger]

Hmmm, strange....

I've measured some of the old pipe I cut off and it's 22mm. To ensure I'm measuring properly I measured some old pipe too. Wonder if it's a bit slippery from the ptfe paste? Hmm.

 

[PlumbBobBob]

you need to use ptfe tape round the olive not ptfe paste

 

[Best]

The 22mm olives will crush in too much & the olive will tend to push on into the fitting & miss most of the taper on the brass fitting. Also the 22mm olive will very easily tighten not straight as it is slack.
A beefier 22mm olive - like a conex olive, can be okay if you slightly compress it in the fitting before you put it on the 3/4 pipe, until it is a tight fit for the 3/4 pipe & then compress it on the pipe.
Better just to use 3/4" olives! Old 3/4 olives sometimes can be reused again.

22mm x 3/4" soldered connectors are the top job to take you to 22mm pipe.

 

[joe brown]

I've just rang a merchant (who closes about now) and he's talking to me about leadlock, says he doesn't have 3/4 olives. I've dressed the olives in V2, ptfe paste.

Didnt realise u where connecting lead to copper

 

[AWheating]

best to use 3/4 olive or end feed old to new. Always better peace of mind using the correct fitting imo.

 

[HawkWhiteFinger]

Didnt realise u where connecting lead to copper

I wasn't connecting lead to copper. I was connecting copper to copper. Why the merchant was talking to me about lead locks is beyond me.

 

[HawkWhiteFinger]

you need to use ptfe tape round the olive not ptfe paste

That ptfe paste is pretty good stuff for dressing olives actually. It's got rid of weeping joints for me in the past. It's quite useful stuff.

 

[BLOD]

if going from 3/4 to 22 then I'd use a soldered joint (like best says) or use a compression fitting with the correct olive - most merchants should be able to sort you out.

 

[SimonG]

Soldered 3/4" to 22mm for me as well.

 

[on31ll]

That ptfe paste is pretty good stuff for dressing olives actually. It's got rid of weeping joints for me in the past. It's quite useful stuff.

Use tape to bulk it up as to speak ! Hes told you to use tape as the paste will just be pushed out the joint ! Still allowing the joint to swival

 

[Reg Man]

YS1M fitting or do remember CU1M for the old boys. Translated: Yorkshire soldered capillary ring fitting 22mm to 3/4". End feed version OK too. 3/4" olives for compression ok ish as a minimum but still leaves the pipe slack in the fitting. Anything else would not consider.

 

[neily01]

Thats a funny old merchant if they have never heard of 3/4" olives they are a common item.

 

[HawkWhiteFinger]

Thats a funny old merchant if they have never heard of 3/4" olives they are a common item.

From the sounds of it over the phone they probably didn't understand what I were asking for. The bloke who runs it knows what he's doing, shame I never got to speak to him.

 

[HawkWhiteFinger]

I have no idea what that edit is above or means, by the looks of it it appears to be entirely what I posted. :thinking2:hmmm, confused Hawk!