Q how much will a replacement boiler cost? Homeowners depends on professional plumbing service... What are your experiences of installing a new boiler? how much did you manage to save? let us know! That the service valve has not been switched off or is partially closed. Great service, fast and efficient!! highly recommended!! Kil•block - drain unblocker x - an extremely effective product. I'll have to think that one over for awhile a very informative blog, as usual, and voted up!.