Dominator Pump & Fuel Filter #10 to #12

[jimbo72]

I have the 12-1400/1800 Dominator pump (#10 in/out) and have the Holley filters (#12 in/out). I wanted to screw the pre-filter into the pump.
Do they make an adapter? I have one that goes 12 to 10, but one end is for a hose end. It extends into the pump further than it prob should.
I could trim the end, add an o-ring, but if there's an adapter (double o-ring), that would would be nice.

[Danny Cabral]

...but if there's an adapter (double o-ring), that would would be nice.

I checked the Earl's plumbing catalog and there's no reducing o-ring union fittings.
You can use a -10AN coupling (AT915110ERL), -10AN o-ring port adapter (AT985010ERL), & -12/-10AN o-ring port adapter (AT985011ERL).

Earl's Plumbing sells these four swivel type o-ring port union fittings:
https://www.holley.com/products/Plum...ts/AT985212ERL (-12 O-Ring Port Union)
https://www.holley.com/products/Plum...ts/AT985210ERL (-10 O-Ring Port Union)
https://www.holley.com/products/Plum...ts/AT985208ERL (-8 O-Ring Port Union)
https://www.holley.com/products/Plum...ts/AT985206ERL (-6 O-Ring Port Union)

And Holley sells these three non-swivel type o-ring port union fittings:
https://www.holley.com/products/plum...s/parts/26-169 (-12 O-Ring Port Union)
https://www.holley.com/products/plum...s/parts/26-167 (-10 O-Ring Port Union)
https://www.holley.com/products/plum...s/parts/26-165 (-8 O-Ring Port Union)

UPDATE: Earl's & Holley now sells o-ring port reducer/adapter fittings, but they're still not swivel type (LINK):
https://www.holley.com/products/plum...s/parts/26-166 (Holley -10/-8 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...ts/AT985109ERL (Earl's -10/-8 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...s/parts/26-168 (Holley -12/-10 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...ts/AT985111ERL (Earl's -12/-10 O-Ring Port Reducer Union)
https://www.holley.com/products/fuel...ts/AT985115ERL (Earl's -16/-12 O-Ring Port Reducer Union, Aluminum Anodized)
https://www.holley.com/products/fuel...arts/965115ERL (Earl's -16/-12 O-Ring Port Reducer Union, Steel/Nickel Plated)

[S2H]

They exist. Maybe not through Earl's, but they exist.
I think my fittings were Jegs brand, if I remember correctly.

[Danny Cabral]

I found them:
Aeromotive 15682 (LINK) -12/-10 O-Ring Port Reducer Union
Aeromotive 15638 (LINK) -10/-8 O-Ring Port Reducer Union
http://documents.holley.com/techlibr...read_sizes.pdf (AN Thread Size Reference Guide)

UPDATE: Earl's & Holley now sells o-ring port reducer/adapter fittings, but they're still not swivel type (LINK):
https://www.holley.com/products/plum...s/parts/26-166 (Holley -10/-8 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...ts/AT985109ERL (Earl's -10/-8 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...s/parts/26-168 (Holley -12/-10 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...ts/AT985111ERL (Earl's -12/-10 O-Ring Port Reducer Union)
https://www.holley.com/products/fuel...ts/AT985115ERL (Earl's -16/-12 O-Ring Port Reducer Union, Aluminum Anodized)
https://www.holley.com/products/fuel...arts/965115ERL (Earl's -16/-12 O-Ring Port Reducer Union, Steel/Nickel Plated)

Earl's Plumbing sells these four swivel type o-ring port union fittings:
https://www.holley.com/products/Plum...ts/AT985212ERL (-12 O-Ring Port Union)
https://www.holley.com/products/Plum...ts/AT985210ERL (-10 O-Ring Port Union)
https://www.holley.com/products/Plum...ts/AT985208ERL (-8 O-Ring Port Union)
https://www.holley.com/products/Plum...ts/AT985206ERL (-6 O-Ring Port Union)

Earl's had what I needed, because the Holley 12-800 fuel pump & 162-554 post-filter o-ring ports are the same.
I replaced the OEM in-tank sock pre-filter with a new one, that's why there's no pre-filter installed/shown below.

[jimbo72]

That's what I was looking for, thanks!

[Danny Cabral]

That's what I was looking for, thanks!

Yeah, Aeromotive is currently the only company that makes that o-ring port reducer/adapter fitting that swivels.
Earl's needs to offer this swivel type, since Holley sells compatible pumps & filters with two different port sizes.

UPDATE: Earl's & Holley now sells o-ring port reducer/adapter fittings, but they're still not swivel type (LINK):
https://www.holley.com/products/plum...s/parts/26-166 (Holley -10/-8 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...ts/AT985109ERL (Earl's -10/-8 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...s/parts/26-168 (Holley -12/-10 O-Ring Port Reducer Union)
https://www.holley.com/products/plum...ts/AT985111ERL (Earl's -12/-10 O-Ring Port Reducer Union)
https://www.holley.com/products/fuel...ts/AT985115ERL (Earl's -16/-12 O-Ring Port Reducer Union, Aluminum Anodized)
https://www.holley.com/products/fuel...arts/965115ERL (Earl's -16/-12 O-Ring Port Reducer Union, Steel/Nickel Plated)

S2H, you probably already know this, but Holley now sells the fuel filter mounting brackets (LINK).
https://www.holley.com/document/flyer_holley_np.pdf (New Product Flyer)