How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
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Does a QEST brand mark on pipe mean that it is polbutylene (PB)?
Thursday, June 21, 2018
Qest did make PB (polybutylene) pipe until manufacturing was discontinued in the mid-1990s, as shown above, but they also now make PEX (cross-linked-polyethylene) pipe. The difference between them is that PB pipe will have “PB2110” next to the brand name, and PEX is marked “PEX”. PB pipe will normally be gray, although it was manufactured in a couple of other colors, and the PEX is usually blue, red, or white.
See our blog post What does polybutylene pipe look like? Why is it a problem? for more on PB pipe.
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Here’s links to a collection of our other blog posts about PLUMBING PIPES:
• How can I protect my pipes to keep them from bursting during a hard winter freeze in North Florida?
• Can galvanized steel pipe still be used for new water lines in a house?
• How can I tell if I have cast iron pipes in my house?
• Why can't a sanitary tee be used for a horizontal-to-horizontal drain pipe connection?
• What is the difference between green and white sewer drain pipes?
• Is a washing machine drain hose required to be secured at the standpipe?
• What are the abandoned pipes sticking out of the wall in my house?
• What are the code requirements for plumbing vent terminations?
• What are the code requirements for layout of drain piping under sinks?
• What causes a gurgling sound when a bathtub or sink drains?
• What is a "combination waste and vent" in a plumbing system?
• What is a galvanized nipple?
• What are the pipes sticking out near my water valves?
• How do you accurately find a broken water pipe leak under the floor slab?
• What is the difference between water pipe and sewage (waste) pipe?
• Are plastic pipes (PVC, CPVC, and PEX) safe for drinking water?
• Is a hot water faucet handle required to be on the left?
• What is the difference between water service pipe and water supply pipe?
• What are the pipes on my roof?
• Why is old galvanized steel water pipe a problem for homebuyers?
• What does polybutylene pipe look like? Why is it a problem?
• Which water pipes are an insurance problem and possibly uninsurable?
• Can you connect CPVC pipe directly to a gas water heater?
Visit our PLUMBING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.
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