Hi I’m Vance and welcome back to Repair and Replace.
In this episode, I'll show you how to install a Delany Flushboy, Rex, or Presto Flushometer.
To begin, you'll need a flushometer, a smooth jaw wrench, and a flat blade screwdriver.
You might also need a pipe cutter, solder flux paste, lead free solder, and a blow torch.
First, dry fit the flushometer in place to check the height and position.
Starting from the top of the fixture, measure up to the middle of the supply line.
Water closets and urinals will have a max height of 11-1/2".
The flush pipe can be trimmed down to a different height if needed.
If you measure from the center of the supply line, to the centre of the valve,
it should be 4-1/4" to 5-1/4".
Next measure from the wall to the center line, it should be a minimum of 2-1/4" away.
Now check the length of the copper tube.
Measure from the wall to the centerline of the flushometer.
The copper tube should be one inch shorter than that distance.
Cut the pipe if necessary.
Next solder the adapter to the copper tube to secure it in place.
Cut the cover tube 1-1/2" shorter than the centerline measurement.
Slide the wall flange and cover tube over the supply pipe.
Now screw the inlet stop onto the adapter.
Use a smooth jaw wrench to tighten it into place.
Next install the spud or flush pipe.
Slide on the vacuum breaker coupling.
Next slide on the spud coupling assembly which is made up of the coupling nut, flange,
friction ring, and rubber washer.
Align the flush pipe and hand tighten the nut.
Now assemble the vacuum breaker.
Slide the plastic insert into the lip of the rubber sleeve,
and place the washer overtop.
Now insert the vacuum breaker into the flush pipe.
Set the flushometer body on the flush pipe and hand tighten the tailpiece coupling,
and hex coupling.
Now use a smooth jaw wrench to secure each connection.
Turn on the shut off valve to the supply line.
Next use a flat head screwdriver to open the control stop one full turn.
Now test the flushometer.
The first flush should eliminate all the air from the lines.
If this is a new installation, it's recommended to flush the valve
4 or 5 times to clean out the supply line of any debris.
Now adjust the control stop until you get a normal flush with a quiet operation.
Finally, replace the cap.
If needed, the regulating screw can be adjusted to fine tune the flush volume.
Now this will change how long it takes the valve to reset.
Now turning the screw clockwise will decrease the flush volume
and turning the screw counter clockwise will increase the flush volume.
The screw is very sensitive, so start with a half turn and test the flushometer
until you get the desired flow rate.
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