CHAPTER 8
REPAIR OF WATER SYSTEM PLUMBING INSTALLATION
Section I. TUBE ASSEMBLIES, FITTINGS, AND MANUAL VALVES
(2) Inspect tube assemblies for cracks, bends
8-1. General
or crimps which might restrict flow or result in leakage.
This section contains repair instructions for the tube
Inspect connection nuts and sleeves on tube assemblies
assemblies and fittings that interconnect water system
for loose sleeves or damage to nuts.
components and for the manually operated valves
(3) Inspect check valves for crossed, stripped
utilized to control water flow and vent the system.
or peened threads.
8-2. Removal and Disassembly
(4) Inspect hot and cold water shutoff valves,
Refer to TM 5-6115-586-12 for instructions regarding
hot water return / drain valve, and hot water tank vent
removal of tube assemblies, fittings, and valves.
valve for crossed, stripped, or peened threads or other
8-3. Cleaning, Inspection and Repair
visible damage. Check valves for ease of operation and
a. Cleaning. Clean tube assemblies, fittings and
absence of binding.
valves with soft bristle brush and hot, soapy water.
c. Repair.
Rinse thoroughly and dry with filtered, compressed air.
(1) Replace all fittings damaged beyond
simple repair of threads.
Note
(2) Replace defective tube assemblies.
Do not use solvent for cleaning as
(3) Replace check valves if they do not operate
plumbing must carry potable
properly or if threads are damaged beyond simple
water. If necessary, the ends of
repair.
tube assemblies may be sealed
(4) Replace leaking or binding valves and
and the external surfaces cleaned
valves with damaged threads.
with a rag moistened with solvent.
8-4. Reassembly and Installation
b. Inspection.
Refer to TM
5-6115-586-12 for instructions on
(1) Inspect fittings for stripped, crossed or
installation of tube assemblies, fittings, and valves.
peened threads. Inspect plumbing fittings for cracks or
clogged passages.
Section II. SURGE TANK AND PRESSURE SWITCH
(1) Inspect threaded areas for crossed,
8-5. General
stripped or peened threads.
The surge tank dampens pressure surges in the water
(2) Inspect tank for cracks, breaks in welds and
system. It is mounted to a bracket in the water system
dents. Tank shall not leak when tested at 150 PSIG
compartment by two clamps. The pressure switch,
minimum.
mounted to fittings at the top of the tank, actuates the
(3) Inspect switch body for dents, cracks, or
hot water pump contactor (K 15).
other damage.
8-6. Removal
(4) Check continuity across switch terminal
Refer to TM 5-6115-586-12 for removal instructions.
posts. Contact arrangement is single pole, double
8-7. Cleaning, Inspection and Repair
throw: common to one post should be open and
a. Cleaning.
common to the other post should be closed.
Note
(5) Apply adjustable pressure to pick up area of
Cap openings prior to cleaning
switch and check that the closed set of contacts open
tank externally with solvent. Do
and the open set closes at 10-1 PSIG. Contacts should
not get solvent inside tank.
return to normal positions at 5 PSI differential on
(1) Clean external portions of the tank using an
decreasing pressure.
approved solvent and a stiff bristled brush.
c. Repair.
(2) Back flush tank with clean hot water.
(1) Repair damaged threads. If threads cannot
b. Inspection and Testing.
be repaired, replace the part.
8-1
