Lock out on Sterling Burner Heating World Grandee Combi

[Softus]

But it's more trustworthy. I doubt you play these games with your customer's invoices, or quotations for that matter. I don't see where your comment has helped the OP.

(a) I don't do quotations, and (b) I was doing something else while you were helping the OP.

 

[DIYerHELP]

Problem solved... it was a faulty non-return valve.

Thanks for your input on this one!