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ENGLISH

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2

1/4-inch

Compression 
Sleeve

locknut

Thread the brass compression fittings into the ports in the 
housing. Be sure that the smaller 3/4" NPT end of the fitting 
goes into the port. Tighten the compression fittings with the 
1

1

4

" wrench until they are snug. DO NOT OVERTIGHTEN.

Place the filter (with its fittings) in position on the pipe.  
Be sure that the port marked “IN” is on the side toward  
the water meter so that the flow enters the filter through  
this port. 

Insert the copper pipe into the inlet, making sure that the 
copper pipe bottoms out inside the filter head. Tighten the 
left-hand lock nut securely with the wrench. Hold the fitting 
with a wrench to prevent overtightening it in the housing.

Repeat Step 8 with the outlet compression fitting, sleeve,  
and nut. Skip to Step 10 under “All Installations”.

Installation on Galvanized Pipe:

Thread the cut pipe ends and clean all traces of cutting oil, 
rust, hardened pipe compound, etc., from all threads that will 
be attached to the unit. Clean the pipe threads, DO NOT use 
gasoline. Dry them with a clean rag; remove all chips; polish 
and deburr. Use only Teflon

®

 tape (without adhesive backing) 

on the pipe threads attached to this unit.

Apply teflon tape three turns around the threads of the pipe 
coming from the water meter. Using the “IN” port, hand 
screw the filter onto the water pipe until it is tight. Removing 
the tank will make this easier. DO NOT OVERTIGHTEN.

Wrap three turns of teflon tape around each end of the 2" 
nipple and screw one end into the “OUT” port on the filter. 
Screw the union onto the other end of the nipple.

Wrap the remaining pipe thread with teflon tape and screw 
the other side of the union onto it until tight.

Assemble the union and tighten the large nut securely. Make 
sure that the pipe ends align and that the union is clean for 
a watertight fit (no tape or compound on the union-half 
threads). See Figure 3.

 

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9.

3627 1199

3

Water

Flow

2" Pipe Nipple

Filter Ports

Pipe Union

Threaded, 

galvanized 

pipe end

All Installations: 

Install the filter cartridge in the Cartridge Tank.

To avoid flooding and water damage, make sure that the O-
Ring between the housing and the tank is in good condition 
and properly seated in its groove when reassembling the unit. 

The filter is now ready to test. Turn the filter top (using the 
blue wrench supplied with the filter) clockwise to “OFF”. 
Slowly open the main water supply valve and check for leaks. 
Turn the filter top (again using the wrench) from “OFF” to 
“FILTER”. If any fittings or joints leak, tighten slowly until the 
dripping stops.

Open the faucet and flush the filter for at least 10 minutes 
after installation to remove the trapped air.

WhEN TO ChANGE ThE CARTRIDGE

The cartridge’s life depends on the water volume used and 
the substances in the water. Normally the cartridge should be 
changed at intervals of ninety days or less. Replace it sooner if 
the water pressure at the faucet begins to drop noticeably or 
if you notice changes in the taste, color, or flow of the filtered 
water.

NOTICE:

 Certain types of harmless bacteria will attack 

cellulose material. Cartridges containing cellulose may seem 
to disintegrate, produce a “sewer” or “rotten egg” odor, or 
form a black precipitate due to bacteria. If this happens, consult 
OMNIFILTER Customer Service for advice.

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Summary of Contents for U25 D series

Page 1: ...IFILTER Customer Service at 800 937 6664 Para mayor informaci n sobre la operaci n instalaci n o el mantenimiento Llame al Servicio al Cliente de OMNIFILTER 800 937 6664 OPERATING SPECIFICATIONS Flow...

Page 2: ...w of the water being filtered indicate that the cartridge should be replaced Use only OMNIFILTER replacement cartridges This installation must comply with all applicable state and local regulations Us...

Page 3: ...the other end of the nipple Wrap the remaining pipe thread with teflon tape and screw the other side of the union onto it until tight Assemble the union and tighten the large nut securely Make sure t...

Page 4: ...et for about 10 minutes to allow any accumulation of air fines etc to flush out NOTICE Use only genuine OMNIFILTER replacement cartridges for best results Failure to use OMNIFILTER replacement cartrid...

Page 5: ...del agua filtrada indican que se debe cambiar el cartucho Use s lo cartuchos de repuesto OMNIFILTER Esta instalaci n debe cumplir con todas las leyes y reglamentos locales y estatales Use s lo cinta...

Page 6: ...y apriete la tuerca grande firmemente Aseg rese de que el extremo del tubo quede alineado y que la uni n est limpia para un ajuste herm tico no coloque cinta ni compuesto en las medias roscas de la un...

Page 7: ...cumulaciones de aire finos etc AVISO Use solamente cartuchos de repuesto genuinos OMNIFILTER para obtener mejores resultados Si no se usan filtros de repuesto OMNIFILTER la garant a quedar anulada PAR...

Page 8: ...a os U25 Serie D Limited 1 Year Warranty OMNIFILTER warrants to the original owner under normal use Water Filter Housings to be free from defects in material and or workmanship for five 5 years from...

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