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MSGal
Replacing water filter on hot water heater
MSGal

This is my first time to replace the water filter on the hot water heater (supply line leads to the refrigerator water dispenser and ice maker). My question is this: Which end of the filter should be pointed toward the water heater, In or Out? There are no indicators on the old filter as to flow direction. I have done extensive internet searches and cannot find any information on the subject.

A. Spruce
Re: Replacing water filter on hot water heater
A. Spruce

I have never heard of a filter for the water heater, the fridge supply, yes, but not to the W/H. If the new filter is directional, there should be markings on the filter itself and/or the instruction sheet that came with it.

Word to the wise, with the installation of any new water filter, hook it up to the supply side, then run it into a bucket BEFORE hooking it up to the appliance or fridge to flush out silt and manufacturing debris. Run water through the filter until it runs clear for 30 seconds or so.

dj1
Re: Replacing water filter on hot water heater
dj1

I don't know what kind of set up you have, but if your ice maker line comes from the hot side of your water heater - that's a mistake. Filters should be on cold lines. A picture of the filter and the line connection will be good to see (load your pics on a host like photobucket, then post your link here).

Furthermore, you probably have a built in filter, inside your fridge - that has to be changed too, depending on water use.

And if you have a whole house filter, that has to be replaced too, depending on water use.

One dirty filter will cancel all clean filters.

ed21
Re: Replacing water filter on hot water heater
ed21

If using hot water to make ice cubes and dispense cold water, you have a problem.
Best to figure out what is going on and what the filter if for.
If you can't figure it out get a knowledgeable person or plumber to explain the situation.
A clogged whole house filter will lower the water pressure over time.
Note the direction of flow and hot/cold on the pipe with a sharpie or tag.
Be sure to find out where the main shut off is.

MSGal
Re: Replacing water filter on hot water heater
MSGal

There are three filters: One on the well (which I changed), one in the refrigerator (which I changed), and one on the hot water heater with the supply line to the refrigerator. The supply line runs from the cold side of the hot water heater. There was an existing filter, but no indication as to In or Out on either end. The new filter reads In on one end and Out on the other. I'm just having trouble figuring out which end of the filter to put where. My late husband took care of changing the filters for many years, and this is my first time dealing with this task.

I tried to download a photo with the first post, but the download failed.

ed21
Re: Replacing water filter on hot water heater
ed21

It sounds like the filter is an inline filter. The in part is where the water flows in to the filter in your case the end toward the water heater line, the out is the direction the water flows out or towards the refrigerator.

MSGal
Re: Replacing water filter on hot water heater
MSGal

Yes, it is an inline filter. Thank you so much for the information and to everyone else who responded to this post.

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