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Sure can be. Most homes only use 3/4 for the main runs so 1" would be even better.
What kind of pipe is it?
 

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Discussion Starter · #3 ·
It's a copper pipe. I bought a unit from sears and had a plumber came over to install it. He said it cannot be installed because of the differemt in pipe size. He said he cannot reduce the pipe from 1 1/4 to 1" because the water pressure will reduce greatly. Please advise. Thanks.
 

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Total BS. Inless this is a multi unit apartment building it would work fine.
Let me guess he wanted to sell you a softner with a bigger, hole?
 
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And he want to pick up up for you and then mark it up.
That's where they make more money.
Time for a new plumber or do it yourself.
 

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Discussion Starter · #7 ·
Yeah, Sears already charged me $159 for installation and this guy was charging me another $260. I asked why does he has to charge $260 extra? He said what I paid was the "Sears installtion". I'm really confused so I told him I'll just do it myself.
 

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I've never even seen any home with a 1-1/4 supply line, sounds odd ball to me.
 

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Do you think it is safe to reduce the pipe size from 1 1/4 to 1" though?
Not a safety issue so far as I can see. As others have posted it is difficult to imagine that a 1" line is not sufficient for a typical home.

But that said codes are developed for what are typically good reasons and failure to follow code can cause problems down stream when, for example, trying to sell a property.
 

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Discussion Starter · #16 ·
Only place that I can think of that would use a incoming line size like that, would be a commercial structure. I am calling bunk on this one also. At around 23gpm, that is a lot of water gushing into that softener system.
The softener (GE 4000 $497 at Home Depot) stated that it is for installation with the 1" or 1 1/4" pipe.
 

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Discussion Starter · #19 ·

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I was looking at the link and the system has a flow rate of 9.5gpm at 15psi drop and as the flow rate goes up so will the pressure lose and that most likely with either the 1 or 1 1/4 plumbing for the system as the VALVE and media will only handle so much.
If you are looking for cheap then this is the system but the flow rates will suffer.
 
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