VALVE ADJUSTMENT: Water flow is controlled to a degree by the size of the valve orifice (Ref No 5). More water
flows with the VP26 1/4” orifice than with VP24 1/8” orifice. The two orifices are interchangeable without changing
the valves. If you have low or gravity flow pressure, you might be able to use a VP26 orifice in a VP226 valve to get
higher water flow. If your valve will not shut off completely, check your water pressure. The valve works best on wa-
ter pressure up to about 60 psi. Higher pressures may require the installation of a pressure regulator.
If the float bounces, valve chatters or there is a pounding noise in the water line when the water turns on or off, it
can be due to an excessive amount of air in the water line. The best course probably is to consult an experienced
plumber as there can be several options to correct this.
If there are issues with valves, they tend to be related to high water pressure as discussed above. The origin of high
water pressure issues tend to be rural or urban water systems. If your water source is your own well, low pressure is
more likely to be an issue. Low water pressure from wells can have many sources including: low water yields from
the well, size of the well casing, adequacy and working condition of the pump, pressure settings if available, size
of distribution pipes among others. Consult a well driller or knowledgeable plumber. Higher pressures may require
the installation of a pressure regulator. ALSO NOTE: If you purchased Models MC,MJ or MK, you are receiving our
VP226 valve, which comes with VP24 orifice. VP24 orifice has an 1/8 inch opening. See Exhibit F. Also included
with VP226 valve, is a small poly pack containing a VP25 orifice. If water drip is a problem and you believe you have
done everything correctly- installation, controlled water pressure, etc, try VP25 orifice. It has a 3/32 inch opening. It
flows about .5 to 1.5 gallons per minute.
7
6INSTALL FLOAT: SEE EXHIBITS F AND G. Screw either VA225P 1 1/8” arm
(MC, MJ, MK) or WC726P 3 5/8” arm (Ref No 10) into the boss on OP321
Float (Ref no 11). The hole on the float is not threaded. Make sure the arm
is threaded in as straight as possible. Note that the float goes in the waterer
in the vertical position. The arm can be tightened using VP115 (ref No 9)
adjust screw (wing nut or thumb screw). You can alter the water level in the
trough by changing the float position. Loosen the adjust screw and try vari-
ous float positions until the desired level is attained. Tighten adjust screw
securely. Place the valve cover, drain and refill the trough several times to
ensure that the float arm operates freely. If the float tilts to one side or the
other, loosen the assembly nut (Ref No 8) and turn the valve body slightly.
If you still think there is interference, you may need to trim some insulation
underneath of the cover. If you have high water pressure, it may be that the
float will not always stay in the same position where you would like to have
it. A star washer (not included) placed between the VP29 valve arm and the
float arm will help secure the float at the desired height.
MC180 ELBOW
ASSEMBLED TO
VALVE IS ALREADY
ATTACH MC183 FLEX
HOSE ASSEMBLY TO
LOWER END OF
GALVANIZED NIPPLE
AND THEN TO YOUR
SHUTOFF VALVE AND/OR
WATER SUPPLY
Exhibit E
5
HEATER: Model 77 heater is installed on our MC, MJ, MK, and MH waterers. Model 77 is a 500 watt heater that plugs
into a 120 volt outlet. It draws a maximum of 4 amps. The heater features a control knob which allows a range of 15
watts (at the lowest setting) to a maximum of 500 watts. You will probably never need to turn the knob more than
about half way. The electrical supply line needs to be installed by a qualified electrician in accordance with all electri-
cal codes. See the WARNING on page 1 and Exhibit A on page 2. When heat is not needed, we recommend that you
unplug the heater. The heater is not thermostatically controlled. The heater is not immersible.
Model 77 Utility Heater is warrantied for 18 months. Please return your warranty card. The serial number for your model
77 heater is found on the label which is around the control knob. Look for it just below the knob.
If a new unit fails to operate after installation of the unit has been installed and working and then begins to freeze, check
the following:
Make sure the heater is getting 120 volts of electricity. Low voltage will reduce the heat put out. If no electricity is pres-
ent, turn off the main fuse box for the unit. Check all wire connections to sure they are correct and tight. Check all fuses.
Then, turn on the electricity.
Make sure the water trough is clear of mud and silt. Mud can insulate and not allow the water to heat.
If you are sure that adequate electricity is being delivered to the unit and there is still no heat, most likely the heater
needs to be replaced.
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