Installing Water Supply Diversion for Double - Basin Sinks: A Step - by - Step Guide

When you have a double - basin sink in your bathroom or kitchen, ensuring proper water supply diversion is essential for smooth operation. This guide will walk you through the process of installing water supply diversion for double - basin sinks, covering everything from initial preparation to final checks.

Pre - Installation Preparation

Assessing the Plumbing System

Before starting the installation, it's crucial to understand your existing plumbing system. Check the location of the main water supply lines, both hot and cold. Determine if there are any existing shut - off valves that can be used or if new ones need to be installed. Also, look for any potential obstructions or issues in the pipes that might affect the new installation. If you're not familiar with plumbing systems, it might be a good idea to consult a professional plumber for an initial assessment.

Gathering Necessary Tools and Materials

You'll need a variety of tools for this installation, including adjustable wrenches, pipe cutters, pipe threaders, Teflon tape, and a basin wrench. Additionally, you'll need the appropriate pipes and fittings for the water supply diversion. The type of pipes will depend on your existing plumbing; common options include copper, PEX, or PVC. Make sure to measure the distances accurately to get the right lengths of pipes.

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Planning the Water Supply Diversion Layout

Determining Pipe Routes

Based on the location of the double - basin sink and the existing plumbing, plan the most efficient route for the new water supply pipes. Try to keep the pipes as short and straight as possible to minimize pressure loss and the risk of leaks. Consider the accessibility of the pipes for future maintenance or repairs. If the pipes need to pass through walls or floors, make sure to use appropriate sealants to prevent water damage.

Selecting Fittings and Valves

Choose the right fittings and valves for the water supply diversion. T - fittings are commonly used to split the water supply into two separate lines for each basin. Make sure the fittings are compatible with the type of pipes you're using. Also, install individual shut - off valves for each basin. This allows you to turn off the water supply to one basin without affecting the other, which is useful for repairs or when one basin is not in use.

Installing the Water Supply Diversion

Cutting and Threading the Pipes

Using a pipe cutter, cut the pipes to the required lengths according to your planned layout. If you're using metal pipes like copper, you may need to use a pipe threader to create threads on the ends of the pipes. This will allow you to connect the pipes to the fittings securely. For plastic pipes like PEX or PVC, you can use appropriate connectors that don't require threading in most cases.

Connecting the Pipes and Fittings

Apply a thin layer of Teflon tape to the threaded ends of the pipes to create a watertight seal. Then, use adjustable wrenches to tighten the connections between the pipes and the fittings. Start by connecting the main water supply lines to the T - fittings. Then, connect the individual lines from the T - fittings to the shut - off valves for each basin. Finally, connect the shut - off valves to the faucet supply lines of the double - basin sink.

Installing the Faucet Supply Lines

Attach the faucet supply lines to the shut - off valves. Make sure the connections are tight to prevent leaks. If the faucet supply lines are flexible, you can adjust their length to fit the distance between the shut - off valves and the faucets on the double - basin sink. Use a basin wrench to tighten the connections under the sink if necessary.

Testing and Final Checks

Turning on the Water Supply

Once all the connections are made, slowly turn on the main water supply valves. Check for any immediate leaks around the connections. If you notice any leaks, turn off the water supply and tighten the connections further. It's better to fix leaks at this stage rather than after you've finished the entire installation.

Checking Water Flow to Each Basin

Open the shut - off valves for each basin one by one and check the water flow. Make sure the water pressure is adequate in both basins. Also, check if the hot and cold water are mixing correctly at the faucets. If there are any issues with water flow or temperature, you may need to adjust the valves or check for blockages in the pipes.

Inspecting for Hidden Leaks

After using the double - basin sink for a while, inspect the area under the sink and around the pipes for any signs of hidden leaks. Look for water stains, dampness, or mold growth. If you find any hidden leaks, you may need to disassemble the connections and re - seal them properly.

By following these steps, you can successfully install water supply diversion for your double - basin sink, ensuring efficient and reliable water flow to both basins.