Moen 1255 User manual

1255 Cartridge and O-rings

Removal and Installation

Tools needed

Replacing only

the spout O-rings:

Move to step 9.

Replacing the

1255 cartridge:

Move to step 4.

Grab the dome and pull

upward to remove.

OR

Locate the hole in either the front or back of the handle. If this hole is

covered by a small plug, pry the plug off to remove. Next, use the 3/32”

Allen wrench in the hole to unscrew the Allen screw. This screw does not

need to be fully removed, only loosened until the handle will slide off.

Caution: Always

turn your water

supplies off

before

disassembling

your faucet.

With the

supplies turned

off, move your

fau cet ’ s h andl e

to the “on”

position to

relieve pressure.

2

Highlighted in

orange are

small tabs on

the cartridge

and grooves in

the faucet.

These must

line up.

Installation Tool Option

Tool number: 118305

4

Using the grey assembly tool (supplied with the faucet), pliers or wrench,

unscrew the 1255 cartridge nut counter-clockwise and remove.

Lift the 1255 cartridge out

of the faucet.

1. View the 1255 cartridge to find the three small tabs protruding.

Look into the chamber of the faucet to find the location of the

three large grooves. The grooves will accept the small tabs

protruding from the 1255 cartridge. These tabs and grooves are

highlighted in orange above for demonstration, but will not be

orange on your cartridge and faucet.

Insert the 1255 cartridge

into the chamber making

sure to line up the three

tabs with the grooves.

Use a soft brush to

clean the inside of

the chamber. Make

sure no debris

remains.

Using the grey assembly tool,

pliers or a wrench, tighten the

new 1255 cartridge nut until

snug. Next turn approximately

90 degrees to fully secure the

nut.

OR

7

8

3

To reassemble the

handle: Work

backwards from

steps 3 through 1.

To install spout

O-rings:

Move to step 9.

Gently pry up on the black crown ring. Be careful not

to damage the crown ring; this will be used again

during reassembly.

9

10

Grab the spout and lift up

to remove the item from

the faucet body.

11

In the photo above, the

upper and lower O-rings

are highlighted in orange.

Pry each O-ring out to remove. Be careful not to damage the valve body.

Using the supplied pouch of grease, apply a thin layer of grease

to each rubber O-ring. Place a new rubber O-ring onto the black

valve body and push down until fully seated in the lowest groove.

Place the next O-ring onto the top groove in the valve body.

12

13

4

Use a soft brush to

clean the inside of

the spout. Insure

the inner surface is

clean and smooth.

Slide the spout

back on until it is

flush with the base.

Secure the crown ring

into the top of the spout

so the tabs of the tuck

under the edge of the

channel. The line

highlighted in orange

shows where the gap in

the crown ring should

be located.

To insure the crown

ring is seated

properly, gently pull

upwards on the spout.

If the crown ring is

seated, the spout will

not lift off.

To reassemble the

handle: Work

backwards from

steps 3 through 1.

Once the handle is assembled, you are all done!

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