10.1 Installation tips
MOUNTING OF STOPS
To mount angle stops on male adapter stubs, especially on projects calling for large numbers of flush valves, eliminate wrenching by screwing a coupling and a short length of 1” pipe hand tight to the union outlet of the stop. Swing the pipe until stop is tight on stub. The chrome will remain clean and unmarred.
ADJUSTABLE CENTERS
All flushometer valves have some type of slip joint connection which allows the centre of the flushometer valve to be adjusted. If a variation in the centre is desired, loosen the clamping nut using flat jawed wrench on the two flat edges provided. Spin the union tailpiece in or out to position desired. One complete turn moves tailpiece 1/16“. Tighten clamping nut to lock valve at new center.
CONNECTING THE VACUUM BREAKER
The Vacuum Breaker and flush connection are coupled to the valve outlet in one operation. When making up the nut to the valve outlet a hand tight and one quarter turn. The shoulder of the rubber sleeve in the vacuum breaker is its own gasket.
FACTORY ASSEMBLED
All chrome plated flush valves are shipped with handles (or push buttons or foot pedals) installed and tested.
Where vandalism may be a factor, the flush valve may be concealed in the partition. Only the parts exposed will be chrome plated.
FLUSHING OF SUPPLY LINES
After all flush valves stops are installed it is recommended that the supply piping be flushed to remove pipe chips and dirt from the system before connecting the flushometer to the stop.
HOW TO REGULATE LENGTH OF FLUSH
The length of flush and hence the amount of water consumed per flush can be readily varied. Remove hex head protecting screw and engage regulating screw beneath with a flat head screwdriver. Turn clockwise to lower the screw which will shorten the flush. Turn counterclockwise to raise the screw and lengthen the flush.
Crane Valves require a minimum operating pressure of 10 PSI while flushing. All plumbing fixtures demand at least 10 PSI flow pressure meeting the minimum pressure requirement.
WATER HAMMER ARRESTORS
The installation of water hammer arrestors with flush valves is recommended as good plumbing practice. They should be installed as near to the fixture as possible to prevent water hammer. For example between the last two fixtures, at the beginning of the branch and may also be required in the middle. (Refer to manufacturers recommendations when installing for multiple fixtures.)
TWIN HANDLE OPENINGS FOR RIGHT OR LEFT HAND ROUGH-IN
All concealed models are supplied with two handle openings 180 degrees apart to allow either left hand or right hand roughing in. If roughing in is required on opposite side remove cap and inter change with handle assembly on other side of body.
Flush Valve Maintenance Hints
| Problem | Cause |
| Valve will not flush at all | Control stop is shut. |
| Water pressure or volume is insufficient | |
| Valve gives too long a flush | Valve needs regulation. |
| Bypass orifice is partially blocked | |
| Valve gives too short a flush | Valve needs regulation |
| Valve contains an over sized bypass orifice | |
| Valve continues to run | Bypass orifice is blocked. |
| A foreign object is resting on the auxiliary valve seat or the main valve seat. | |
| Wearing or pitting has occurred on auxiliary valve seat or main valve seat. | |
| Water splashes from the bowl when valve is flushed | The pressure at the fixture is in excess of that set by the fixture manufacturer. |
| Valve will not pass enough water to satisfactorily syphon bowl | Control stop is not completely open. |
| Insufficient volume of water is being supplied to valve due to low pressure or undersized piping or both. | |
| Valves flushes by itself | Water in the relief chamber has been back siphoned through bypass orifice, allowing valve to flush automatically when pressure is restored. |
| Handle of flush valve leaks | Handle packing is worn |
Adjusting the length of the flush
ADJUSTMENT SCREW (Located in the top center)
When the needle control valve on top of the flushometer is screwed down, the diaphragm is prevented from lifting up which reduces the volume of water that escapes out of the upper chamber. The water enters the upper chamber through the bypass orifice which fills the upper chamber. The faster the upper chamber fills the shorter the flush.