Just a quick (hopefully) 'why' question

[Showerman41]

I'm one of these weird people (according to missus) who reads instruction leaflets... the ones for Drayton TRV4 valves tell us not to use half or in-between numbers. Nowhere can I find any info on WHY we shouldn't. Since the valve has halfway-mark lines on it, the average user like me - who gets a plumber to fit things like this - will assume it's OK to use the halfway marks...

So I'd be grateful if I can pick the brains of you experts. Are we damaging the valves if we use halfway marks?

FYI - I had to look for info leaflet online when the valve would not tighten up properly, with the body rotating when I tried to tighten up the spindle nut. (In case that's not its proper name, I mean the serrated one that holds the valve head on to the valve itself).

To Admin - just realised this should have gone in Central Heating forum; could you move it please? TIA

 

[townfanjon]

My opinion ... if thats what the manufacturers say , there must be a reason why they say it .

 

[ShaunCorbs]

Guess it's because they can't give approximately temp range etc I wouldn't be worried with it messing anything up

And put the head to 5 / highest and tighten the retainer nut (hand tight is more than good enough)

 

[Chuck]

My guess is that that the adjuster will stay in the 'good' positions because it 'clicks into place'. If you position it between 'clicks' the repeated opening/closing of the valve will cause it to move up or down until it does click into place.

So, if you want the valve to stay where you set it...

 

[Showerman41]

Thank you all for your responses. Chuck's guess sounds good to me, so will just stick with Drayton's advice.

Followed Shaun's advice and moving it to 5/Max has done the trick

Oh, and thanks, Admin, for moving this to where the right people could see it...