Water filter compare

[Steve7878]

Need to replace an old american plumber whole house water filter.
Found 2 pentex filter and housing that will work.


But have to say I dont understand the info below. Would both be the same? Comparing filter #1 and #2.
Does one restrict pressure or volume more.
Thanks


INITIAL ∆P (PSI) @ FLOW RATE (GPM)

2 psi @ 15 gpm ( 0.14 bar @ 57 Lpm = Filter #1


1 psi @ 10 gpm (0.07 bar @ 38 Lpm = Filter #2

 

[Reach4]

Based on just that spec, #2 would appear to restrict a bit less, but they look similar. Note that the specs like you cite say "initial", and as the filter does its job, the backpressure will rise.

Having a way to measure the pressure before and after can be informative.

 

[Sponsor]

 

[Seiyafan]

Do you have the name of the filters?

 

[Steve7878]

Do you have the name of the filters?

Pentek 10" big bule and Pentek 150546 3G 10"
Both have 3/4" in and out

 

[Reach4]

The Pentek Big Blue housings take 4.5 inch diameter cartridges, and those will hold more sediment before the backpressure rises to a given level.

The Pentek Big Blue usually have a pressure release button, which is important if you put in a 3-valve bypass.

Having a bypass is best, but if you don't have one, it is important to keep an extra o-ring handy when you change cartridges. Sometimes you cannot get the old o-ring back in. With no bypass, and no spare o-ring, an o-ring problem puts your water system out of commission.

 

[Steve7878]

The Pentek Big Blue housings take 4.5 inch diameter cartridges, and those will hold more sediment before the backpressure rises to a given level.

The Pentek Big Blue usually have a pressure release button, which is important if you put in a 3-valve bypass.

Having a bypass is best, but if you don't have one, it is important to keep an extra o-ring handy when you change cartridges. Sometimes you cannot get the old o-ring back in. With no bypass, and no spare o-ring, an o-ring problem puts your water system out of commission.

I was actually looking for one WITHOUT a pressure relief. But I can get each model with or without. My reason was looking at reviews. It does seem sort of common for there to be a leak at the PR valve. So I figured one less thing to worry about. I will have the 3 valves for bypass. And usually just need to replace the filter once a year and use a new O-ring. Really wish American Plumber still mage my model. That was more like a thick gasket compared to the thin o-ring everyone seems to use now.
Open to suggestions. Like is there a simple way to install a plug into the PR valve if every a problem. Would hate to have to replace the head unit if that happened. I am thinking, keep it simple. Last one I have had for about 30 years. I happen to read on most. The clear plastic filter holders are supposed to be replaced every few years. And that is what I have now. And cant get gasket any longer. So was going with the solid cover on this new one.

 

[Seiyafan]

Pentek 10" big bule and Pentek 150546 3G 10"
Both have 3/4" in and out

They have similar pressure drop. To go lower you need to look into 1'' in/out units.

 

[Steve7878]

They have similar pressure drop. To go lower you need to look into 1'' in/out units.

If my main line is 3/4" would a 1" unit make a difference?

 

[Seiyafan]

It depends on the flow rate, if it's less than 8 GPM then the difference between 3/4'' and 1'' is negligible.