Bathroom Sink Plumbing Code

Bathroom Sink Plumbing Code

Here's a diagram of the basic code standards. It does not matter whether it is a kitchen, bathroom, laundry, or bar sink.

•  Trap weir, also called trap seal, minimum of 2" and maximum of 4"
•  Maximum length of trap arm variable based on diameter of pipe
•  30" maximum from sink outlet to centerline of trap
•  24" maximum from bottom of sink to trap seal
•  6" maximum difference between bottom of sinks served by one trap

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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 building trap? 

• 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 a dielectric union?

• What's that powdery crust on the pipe connections at the water heater?

• If all the plumbing drains have water in them and you can still smell sewer gas, what's causing the problem? 

• How can I tell what type of plumbing pipe I have?

• Why is there a flexible accordion pipe under the sink?

• What is the difference between PVC and ABS plumbing pipe?

• What is the difference between water service pipe and water supply pipe?

• What are the pipes on my roof?

• How can I find out what type of water pipe runs underground from the water meter to the house (service pipe)?

• What is a P-trap?

• 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.

Bathroom Sink Plumbing Code

Source: https://www.howtolookatahouse.com/Blog/Entries/2018/6/what-are-the-code-requirements-for-layout-of-drain-piping-under-sinks.html