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Old 09-27-2011, 06:24 PM   #1
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Whole House Filter for Well Water


I am on a well and installed an inline 10" x 2 1/2" sediment water filter a few years ago. All supply lines are currently 3/4" copper from the pressure tank outlet (inlet is 1 1/4" from submersible pump), through the sediment filter, through the water softener to the main trunk line. I use 5 micron filters due to the amount of sediment and rust and have to change it about every 3 weeks or there is too much pressure drop in the house. I am thinking of 2 options and don't want to use 20" filters:

1. Upgrade to a 10" x 4 1/2" sediment filter staying with 3/4" connections (but not sure if this will help with the pressure drop) but the specs on the unit I looked at has a much higher GPM than my current unit at the same PSI.

2. Change the supply line from the pressure tank to 1" and replace the sediment filter with a 10" x 4 1/2" unit with 1" connections. My water softener has 1" connections on the valve body (and included 3/4" reducing bushings) so I could run a full 1" line from the pressure tank to the main 3/4" trunk line and tee back in from 1" to 3/4".

Any thoughts if Option 1 would suffice. Option 2 would require less than 20' of 1" pipe plus connectors and shut-offs. Would this make any noticable water flow or pressure increases?
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Old 09-27-2011, 06:32 PM   #2
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As I understand your explanation the pressure is fine when the filter element is new. It is the clogging of the filter element that causes pressure drop. If I have correctly understood your explanation changing the pipe size etc isn't going to solve the problem.

To extend filter change times you need a larger filter.

Another way to deal with the problem would be a backwashing sediment filter--this makes the filter cleaning process automatic.
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Old 09-27-2011, 06:53 PM   #3
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Thanks for the advice but I prefer not to use another water using device. I am upgrading to a larger filter from 10 x 2.5 to 10 x 4.5 and I was wondering if it would also help to upgrade the water line from 3/4" to 1" as well from the tank through the filter and water softener. I am not an expert on flow rates and was hoping for some technical advice if this was really needed or not.
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Old 09-27-2011, 07:24 PM   #4
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If the pressure is good with the water flowing through a new (clean) filter cartridge increasing the size of the water line is not needed--it is not the pipe that is causing the pressure loss.
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Old 09-28-2011, 10:42 AM   #5
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What Bob said .
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