Vaillant 837 letting by at internal filling loop

[novicegas]

Hi Guys,

Whats the best way to cap off a Vaillant plus which has the integral filling loop, I'm going to fit an external one, Would prefer to cap off the old one rather then pay for new valves and loop. Cheers in advance.

 

[jackeroo]

Just replace the valves and do the job properly the first time the customer has too pay so do it right.

 

[Sharp Point]

Just replace the valves and do the job properly the first time the customer has too pay so do it right.

But to be fair to the OP, you don’t know the state of play. It could be a love job for somebody and wanting it done cheap, he may have a filling loop spare. I’ve no doubt a valiant loop will be more dearer than an £8 filling loop.

 

[jackeroo]

I agree but bottom line is the non return valve on the cold inlet is letting by which in turn is forcing pressure through the flow valve. So to be honest how can you cap it off when it's held in place by an o ring and clip.

 

[Gary Hillard]

Just got a set of valves this week about 65 quid for return and cold inlet valve .

You would have to cap after the non return on the main side with a 1/2" cap and a 1/4" cap on the return side .

 

[jackeroo]

Asking for trouble capping off something that's letting by it's a temporary fix.

 

[Sharp Point]

Asking for trouble capping off something that's letting by it's a temporary fix.

Lol, why is it asking for trouble capping off and making safe something that is leaking?

 

[steadyon]

1. Last time I had to change one, the parts cost was about £120 (both iso's, non-return and flexi). Its an outrageous price for some pretty simple components.

2. And that was the second time it had failed within 10 years.

3. External filling loop is, in my opinion, the way to go. No fancy manufacturer's prices, simple to do. Overall, better for the customer.