How big a plume are you likely to get from the condensate and where is it going to be situated? will it bother the neighbours because of where it is situated? There’s a fill valve you’ll need to use to add pressure. Check out our tool selection guide or chat with a drain brain! M&n heating & plumbing, and all relevant staff members, are gas safe registered our business registration number is. A proud four-time winner of the carrier president’s award! If you don’t have.