Radiator valve with no flange?

[Jon]

Hi. Very much a DIY’er but I’m installing a new radiator and just a bit concerned that when I’m screwing in the inlet valve to the radiator, the fitting that goes into the radiator thread has no sleeve to tighten it up to. As shown in the photo it would just keep screwing into the radiator, is that right?

 

[Rob Foster]

Use plenty of ptfe, and twist it to get it to bite Rob Foster aka centralheatking

 

[Last Plumber]

It should be a taper thread (male fitting) so it tightens into the female. However, there are a lot of foreign radiators that have too slack a female thread. This is found a lot on designer rads and towel warmers in my experience.
I would use loctite 55.
Others will have their own ideas.

 

[Sharp Point]

I usually use 17 wraps of ptfe for rad valves, back in the day when things were machined well.... I used the 10 wrap rule.

 

[Rob Foster]

Hi. Very much a DIY’er but I’m installing a new radiator and just a bit concerned that when I’m screwing in the inlet valve to the radiator, the fitting that goes into the radiator thread has no sleeve to tighten it up to. As shown in the photo it would just keep screwing into the radiator, is that right?

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That looks like a taper thread anyway so ptfe or splodge Will do ...green splodge fir drinking water, yellow splodge gas white splodge steam etc. But ptfe for moi , or silly con Rob Foster aka centralheatking

 

[Rob Foster]

It should be a taper thread (male fitting) so it tightens into the female. However, there are a lot of foreign radiators that have too slack a female thread. This is found a lot on designer rads and towel warmers in my experience.
I would use loctite 55.
Others will have their own ideas.

My woman just hates slack male fittings esp foreign ones that have no taper

 

[Gasmk1]

nobody uses tapers threads anymore for these type of fittings so its either the loctite or lots of ptfe

 

[Jon]

Thanks very much, also I’m guessing the olive will compress around the chrome length at the opposite end of thread, as at the moment before using tools it’s really loose even done up by hand?

 

[Harvest Fields]

Yes it will mate

 

[Rob Foster]

Thanks very much, also I’m guessing the olive will compress around the chrome length at the opposite end of thread, as at the moment before using tools it’s really loose even done up by hand?

Your learning we might make a heating engineer of you yet ⚒

 

[Vicdiy]

Hi. Very much a DIY’er but I’m installing a new radiator and just a bit concerned that when I’m screwing in the inlet valve to the radiator, the fitting that goes into the radiator thread has no sleeve to tighten it up to. As shown in the photo it would just keep screwing into the radiator, is that right?

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13 wraps of ptfe, why 13. The first one I did I wrapped it about 4 times and it leaked. I asked a plumber who said he wrapped it 13 times because his brother who was a plumber taught him that and he'd never had one leak. Make sure you wrap it the correct way so that it doesn't force itself off when you are screwing it in.

 

[SimonG]

What ugly valves for a designer radiator. Would have had them coming out the wall as well rather than from the floor.

 

[townfanjon]

Ptfe ... no , bloody garbage use some loctite 55

 

[Best]

Threads vary and you need to vary the amount of turns of ptfe.