plumbing ez trap 3/4" to 1/2"?


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Old 06-11-20, 01:45 PM
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plumbing ez trap 3/4" to 1/2"?

Intending to install an EZ Trap but wondering about the drain ports on the Aframe drain pan. The EZ Trap has 3/4" fittings. There are 2 ports on the drain pan. The installer-supplied drain pipe is plumbed into the 1/2" port. There is a 3/4" drain port but inside you can see it is designed to drain from only a higher water level and at a lower volume. Any reason this 3/4" EZ Trap should not be plumbed into that port? Any reason I should use the 1/2" port only? I could use a fitting to make the 3/4" reduce for the 1/2" port, but would that not work right or just be unprofessional?


 

Last edited by GaryMN; 06-11-20 at 03:07 PM.
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Old 06-11-20, 04:22 PM
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Both of those ports are 3/4".
The lower fitting is the primary drain.
The upper fitting is the secondary drain.
If the primary drain is working correctly.... there will be NO water coming thru the secondary drain.

The secondary drain line is supposed to be piped to a place where you can see the water flow. If you see water coming out of the secondary drain line..... you know the primary line is clogged. Many installations have a float switch installed in the secondary line. When it gets water.... the float shuts down the condenser.
 
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Old 06-11-20, 04:55 PM
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That makes a lot of sense. What's confusing is that the existing trap is plumbed in with a 3/4" x 1/2" adapter then 1/2" pipe and elbows down to the drain. Since the EZ Trap is 3/4", is there any reason not to use a 3/4" sch 40 pvc male adapter MPT x socket then 3/4" pipe and elbows down to the drain? Was there a reason to do this in 1/2"? Did the installer reduce it to 1/2" and then continue with 1/2" pipe and elbows just to save 40 cents on the installation or what?

These EZ Traps are sold with an optional float and shut-off, causing me to wonder if they are not designed for the secondary and will not work properly in the primary. Is that what's happening?
 
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Old 06-11-20, 04:58 PM
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The drain line should always be kept 3/4". Reducing to 1/2" saves very little.
You can use that trap and float on the primary line and just plug the secondary fitting.
 
 

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