Power Equipment Forum banner

1 - 12 of 12 Posts

·
Registered
Joined
·
7 Posts
Discussion Starter #1
Seek pump PVC adapter. 1.5HP water pump. Cold water pump into tankless water heater.

To the pump is 1-3/4" NPT male thread with 1.75" O ring
To the hose is 1-1/4" male hose


Please advise where to purchase this adapter?
Thank you.
 

·
Registered
Joined
·
1,685 Posts
Seek pump PVC adapter. 1.5HP water pump. Cold water pump into tankless water heater.

To the pump is 1-3/4" NPT male thread with 1.75" O ring
To the hose is 1-1/4" male hose


Please advise where to purchase this adapter?
Thank you.
is it male boss?
male boss uses o ring
npt pipe thread uses tape or just sealer
let me know i can get you a link
or snap a pix of the pump connection
 

·
Registered
Joined
·
7 Posts
Discussion Starter #3
Thanks Paul.
Both side are male. The threaded side has O ring. Yes, the pump surface seem large to mate with female thread.
Will have to go out there to take pic, if possible. Will use tape to seal the thread better anyway.

Just trying to replace the current leaking adapter unit.
Cannot find where to get such large G1.75" adapter.
 

·
Registered
Joined
·
7 Posts
Discussion Starter #5
My guess the pump is probably made in China. Not sure.
Just need to replace adapter hose. The pump seems working fine. Both the adapter & hose was damaged.
Tried Grainger, HomeDepot & Lowe's. Strange, search in Google, found none at 1-3/4" MNPT size. The size jump from 1-1/2" to 2".
 

·
Registered
Joined
·
7 Posts
Discussion Starter #6
We just used a caliber, the exact outside diameter of the thread is 1.84 inches.
Will this make this 1-1/2" MNPT thread? Will the O ring size also 1.5" too?
 

·
Registered
Joined
·
1,685 Posts
We just used a caliber, the exact outside diameter of the thread is 1.84 inches.
Will this make this 1-1/2" MNPT thread? Will the O ring size also 1.5" too?
no
did you see the chart?
and snap a few pix
 

·
Registered
Joined
·
7 Posts
Discussion Starter #8
According to your chart "National Pipe straight mechanical (NPSM)"
1 1⁄2-2411 1⁄21 29⁄321.901 13⁄161.82
This should be 1-1/2" Male national pipe thread MNPT, right?
 

·
Registered
Joined
·
1,685 Posts
post the tag on the pump, and a pix of the fitting on the unit right now.
take an metric measurement as well.
 

·
Registered
Joined
·
1,685 Posts
when you get a chance take the pix
yea new lock downs are making things tough right now for service
 

·
Registered
Joined
·
7 Posts
Discussion Starter #12
customer called and they are getting another pump system from Amazon on Black Friday. That's that.
 
1 - 12 of 12 Posts
Top