How To Install An Under Sink Water Filter

Under Sink Water Filters are easy to install. like aquasona.Many people prefer to hire a plumber, but if you are handy with some simple plumbing you can save yourself some money by installing your own under sink water purification system.  Here is a simple guide to installation :

You’ll need a drill and bit (1/2″ will work) – White plumbers tape and a small adjustable wrench.  Possibly an open-end wrench, when you tighten the faucet base, may work better for you.  You will also need a Phillips screwdriver to install the filter mount to the interior of your cabinet.

A word of caution – Do not tighten the fittings any more than necessary.  You can always tighten them up some more if needed later.  Use plumbers tape on the threads on all your fittings to avoid leakage.

Locate the incoming water supply.  Shut off the water supply or you will have water shooting everywhere. Usually, there is a hose that attaches to the incoming cold water.  If you don’t know which is which just run the faucet on warm and feel the incoming lines. Hot, of course, will warm up.

Once you have located the cold water hose that runs from the incoming supply – (pipe – may be cpvc or copper or even an old iron pipe depending on the age of the system) – Remove the cold water hose that runs from the incoming water pipe and goes up to the cold water the side of your faucet.

There should be a TEE included with the unit – Install the TEE,  just screw it on to the incoming cold water supply pipe using some pipe sealant or pipe tape to avoid any leaks.

Here is where you may have a problem-Your incoming line and the TEE don’t fit.  If that’s the case you’ll have to go to the hardware store and pick up an adaptor.  Not a big deal.

Once you’ve got your TEE installed – Attach the bracket to the side of the interior of the cabinet below the sink, put it up leaving 8 to 10 inches of clearance or more if possible from the bottom of the cabinet so you can save space.

I always recommend the left side, unless of course, you’re left-handed, then it may be more be more convenient on the right.

Run your hand under and behind the left rear corner of the sink.  Feel back there, locate where would be the best location to place the faucet taking into account
the size of the base of the faucet and allowing clearance with the edge of your cabinetry where your sink sits down into the cabinet itself.

Usually, the center of the faucet will locate approx 2 inches from where the top of the sink (in the rear) curves down into the bowl of the sink.

This is the most critical part of the whole installation. Take your time and be sure to locate the hole in the best location where you have plenty of clearance under the sink to install the washer and nut. Drill a hole large enough for the threaded part of the faucet base to fit into.

Put the washer the faucet sits on over the hose and threaded part of the faucet and run the faucet blue line down through the hole – then attach the faucet using the nut and washer provided.

Now install the plastic fittings on the filter top and the side of the TEE where the “finger shutoff is”.  The smaller male fitting goes in the center of your filter housing.
The larger male fitting goes to the side of the top of the housing. Install the female fitting to the side of the TEE.

Install the blue faucet line into the smaller center fitting on the top of the filter housing and the larger white/clear line from the tee to the other fitting on the top of the filter housing. When installing the lines to the fittings just push in firmly and then pull the part of the fitting onto the line.

Once you look it over you’ll see what I’m talking about.   Then pull on the plastic line to be sure the connection is sound. Re-install your hose for your faucet to the top of the TEE.  (Here again – you may need an adapter)

Install the filter to the top of the housing using care to get the threads started right so the filter screws on like it should Put the top and bottom of the filter housing together being sure your O-ring is properly positioned.  Tighten the clamp.

Turn the water back on.  Check for leaks.

Turn on the filter’s faucet and let it run while turning over the filter and shaking it and then turning it upright –  repeat this a few times. By doing this it will help to clear the air trapped inside the filter.  Let the water run for a few minutes.

It will have a lot of air in it for a while. Usually has cleared up within a few uses.  If not
just repeat the process, turning it over and letting
the water runs again. Check for leaks again…

Note: The water enters the filter from the outside and the filtered
water comes out the top/center of the filter.

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