Lavatory Install Review

When installing a Lavatory what is the first item you should install

• P-trap

• Water Lines

• Faucet

• Drain Assembly

Answer explanation

Its so much easier to install the faucet without the drain assembly and the p trap in the way!

What seals the drain assembly to the porcelain sink?

• Plumbers Putty

• Silicone

• Stainless Plumbers Putty

• All the above

Answer explanation

All of these are acceptable but at a bare minimum you should use plumbers putty.

Plumbers Putty can stain Porous surfaces like Granite, Rock, and Plastic

• True

• False

Answer explanation

Do not use plumbers putty, or set plumbers putty containers on rock counters. It will stain and you will have to buy your customer a new countertop!

What is the difference between a Lavatory and a Sink?

• A sink has 2 drains

• A sink is in the kitchen

• you wash your hands in a sink

• you wash you hands in a lavatory

Answer explanation

Sinks are for doing work, lavatories are for washing hands.

What type of connections are between the angle stops and the faucet?

• Flare

• Soldered

• Compression

• Glue

Do you put Teflon tape on compression threads?

• Yes

• No

Answer explanation

Teflon tape would hinder a compression seal.

What kind P-trap will we install on the Lavatory in the Lab?

• Glue

• Cast Iron

• Brass

• Slip joint

What will you use to seal the threads on he threaded tail piece?

• Teflon Tape

• Pipe Dope

• Teflon and Pipe Dope

• Glue

Answer explanation

When dealing with water, always use Teflon Tape and Pipe dope on treaded connections.

What type of wrench will you use to tighten the faucet to the counter top?

• Adjustable Wrench

• Channel Locks

• Basin Wrench

• Spud Wrench

Answer explanation

All plumbers should have a basin wrench in their tool bag. Its hard getting other wrenches in tight spaces and tighten objects.

How many times should you fill the bowl up and drain the water when you test the sink for leaks.

• At least 2 times

• At least 5 times

• At least 10 times

• once

Answer explanation

I've had a leak show up the 5th time I drain a lavatory during a test. Fill the bowl and dump it at least 5 times. Still have the customer check after you leave for a few days before filling the cabinet with incedentals.