If you're based in england, wales and northern ireland, contact the. See what services and offers are available in your area. Other delivery options are available, please visit our. Established in 1959, we have decades of experience in the plumbing industry and our expert portland plumbers are there when you need us to take care of any problem that you may have. We offer a fully comprehensive. If you try it once and it doesn’t flush properly, it’s blocked and no further flushing is going to.