MAPA Products, LLC Box 129 Naples, Texas 75568 Phone (903) 897-2371
Watts (877) 897-2371 Fax (903) 897-2781
Page 3 of 5
Installation of the Under-deck Flange:
Once roofing work at the Hydrant has been completed, the under-deck flange
should be installed. Slide the under-deck flange from below, over the reservoir tank and onto the lower portion of the
hydrant’s shroud allowing equal distance from the shroud to the inside of the under-deck flange. Snug the flange securely
to the deck and angle framing. Using four (4) ¼” X 1 ½” bolts, secure the flange to the angle framing. Care should be
taken to insure that the under-deck flange is firm against the bottom of the roof deck while tightening these set screws.
See
Figure 3
Next, using the four - (4) ¼” X 2” set screws, securely fasten the under-deck flange to the stainless flange
Refer to
Figure 3
of the Instructions.
Installation of the Supply Piping:
Make water supply connection only after the under-deck flange is securely attached
to the Hydrant. Remove the plastic plug from the end of the brass nozzle and connect appropriate piping connections.
We recommend that a minimum ¾” supply piping be used to make this connection. See
Figure 3
Water Supply Test:
It is recommended that the water supply be thoroughly tested prior to activating the Hydrant. To
avoid damage to the valve seat, the water supply system should also be purged of all foreign materials before the supply
valve to the Hydrant is opened.
Operation of the Hydrant:
Hose connections to the Hydrant should only be made using the quick disconnect fitting
provided with the unit. This fitting incorporates a snap-on disconnect with a vacuum breaker. To prevent potential cross-
contamination of the water supply system, it is not recommended that any other type of hose connection be made to the
hydrant than as stated here.
To connect the disconnect fitting to the hydrant pull back on the spring-loaded female end of the disconnect at the
hydrant’s outlet and insert the male end that is attached to the vacuum breaker. Release the spring on the female end.
Attach the ¾” female fitting of a garden hose to the end of the vacuum breaker.
Winterizing for Severe Weather:
It is recommended that to avoid possible damage to the Hydrant due to exposure to
extreme cold weather that during freezing conditions, if a hose is used on the hydrant remove the quick disconnect fitting
with vacuum breaker from the hydrant’s outlet nozzle., then operate the hydrant at full flow without the hose for
approximately thirty (30) seconds to ensure proper evacuation of the reservoir tank.
Maintenance:
A periodic test of the Hydrant should be performed. The dome handle should be opened and closed to assure that no
foreign material has entered the cavity within the dome. Difficulty in turning the handle is a possible indication of the
presence of foreign matter within. To remove this matter, first remove the plastic cap at the top of the handle. Second,
loosen and remove the ¼” lock nut and washers inside the cavity below this cap.
After removal of any foreign material, replace the handle and attachment hardware.
Repairing the Angle Valve Assembly and Shaft:
(The water supply to the Hydrant should be OFF prior to any repairs) Remove the dome handle, the lock nut and washers
to expose the interior cavity. Remove the valve bonnet using a basin or other appropriate wrench. The valve stem and
shaft will lift out of the top of the hydrant. Replace the defective parts and reassemble the valve. Replacement parts
should be ordered from MAPA Products.
After repairing the valve, replace the handle and attachment hardware.
Replacing the Dome Handle:
If the dome handle is broken, replacements are available. Please contact your local MAPA Representative to obtain
repair parts.
