Red Seal Plumbing Practice Exam 2025 - Free Red Seal Plumbing Practice Questions and Study Guide

Question: 1 / 400

Which installation procedure ensures a water tight seal on the waste connection for a wall hung water closet?

Use of rubber lining

Sealant around the base

Adjustable nipple is set for compression of gasket

The reason why the other options are incorrect is because

- Option A, using rubber lining, may provide some level of protection but it is not specifically designed to create a water tight seal on the waste connection.

- Option B, using sealant around the base, may also help with sealing but it is not enough to ensure a completely watertight connection.

- Option D, tightening the connection with a wrench, may actually damage the connection or gasket and lead to leaks.

Therefore, the best option is to use an adjustable nipple that can be set to the right compression for the gasket, creating a tight and secure seal for the waste connection.

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Tightening the connection with a wrench

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