Comstock Estates Residents:

Attached are General Guidelines for Seasonal Shutdown and Startup of Residential Irrigation Systems.  Please print and/or save for future reference. Some of you know all this already, we have a number of new neighbors that may be unfamiliar with irrigation systems, and it’s probably a good review for all of us.  Please let us know if you have any questions or concerns.
Our irrigation water is scheduled to be shut down Saturday October 16.
Jim Jackson

President

Comstock Estates HOA

20 Sep 2021
General Guidelines for Seasonal Shutdown and Startup of Residential Irrigation Systems


Shutdown

1. CRITICAL: After the HOA irrigation water has been turned OFF and the underground system
allowed to drain (approx. 24 hrs), each Homeowner must OPEN their main supply valve in
order to drain any residual water out of the internal components of their valve. Water
trapped in a valve WILL freeze and expand which will cause the valve body to crack. In
most cases, this will not be apparent until Spring startup when the cracked valve fails catastrophically
and the entire HOA system must be turned off in order for the Homeowner to conduct the repair.

2. Each Homeowner should have their irrigation system drained and blown out with compressed air
in order to prevent the freezing and rupture of their lines, valves, and sprinkler heads.

a. There are several companies here in the Grand Valley that provide this service. Just be
sure to schedule them ahead of time because they can get very busy during shutdown time. The
urgency for scheduling early is that there may be a freeze before they can get to your system.

b. A mildly plumbing savvy Homeowner could blow out their own system. This involves
knowing how to hook up an air compressor to their system and manually cycling their valves to
ensure every zone is blown out (even zones that are not in use). There are many blogs and tutorials
online which are highly informative. Be advised that although most home air compressors would
provide enough pressure (~30–70 PSI), many cannot provide the volume of air (CFM) required to
completely remove the water. CFM requirements are dependent on individual zone demand.

3. In the event an early freeze is approaching before the HOA irrigation water is turned off:

a. Close your main valve. Depending on how cold and for how long the temperature
remains below freezing, you may need to take additional precautions to prevent the main valve and
standpipe from freezing. Many times, a blanket and/or a heavy cardboard box to trap the ground
heat in with the main valve will suffice. For additional protection, wrap an electric heating pad
snugly around the main valve and protect it from wetness. It ONLY needs to keep the main valve
and standpipe above freezing; so the warm or medium setting should be more than plenty.

b. Open all of the downstream valves and spigots in your system. This will help drain as
much water as possible. The ideal is to drain the water out of all the above ground plumbing.
Underground valves and lines should be OK provided the ground does not freeze deep.

c. Remove your primary and secondary sediment screens. Screens in individual sprinkler
heads do not necessarily need to be removed unless your sprinkler manufacturer advises to do so.

d. Drain your pump housing. There will be at least 1 but likely 2 pipe plugs or drain valves
on your pump housing. Remove / Open these and allow the water to drain out. Once drained,
replace / close the plugs or keep them out until the system is blown out.

e. Remember to OPEN your main valve After the HOA water is off and drained.

Startup

1. The HOA will notify the Homeowners in advance as to what date the irrigation water will be
turned on via entryway signage and email if you have subscribed for email alerts at
https://comstockhoa.net/subscribe/

2. PRIOR TO the HOA startup date, please ensure your main supply valve is CLOSED and
INSPECT IT for any cracks or damage. The opening of the HOA main valve pressurizes the
underground system and any single failed Homeowner main valve will force the shutdown of the
entire HOA irrigation system (312 homes).

3. If you need to conduct repairs to your main valve and/or standpipe prior to the HOA water-on
date, please contact us via https://comstockhoa.net/contact-us/ or phone the HOA Manager (Lori
Wood) at 970-812-4051, so that we can ensure you have sufficient time to complete your repair
prior to HOA system pressurization.

4. If you have a main valve emergency and the HOA water needs to be turned off, please contact
the HOA Manager (Lori Wood) at 970-812-4051.

Additional Information

– The irrigation water in the Grand Valley is occasionally full of sediment and debris due to upstream
runoff. Other than more frequent maintenance of individual residential systems, there is not much
else that can be done.

– The screen on our pipe head at the main ditch is only able to trap large debris like branches, long
grasses, and the like (this is common). This screen at the pipe head is cleaned regularly to ensure we
maintain a steady volume and pressure in our distribution system. Anything smaller needs to be
filtered by the Homeowners system. Occasionally, the HOA experiences excessive sediment
buildup in some of our distribution lines; which we flush and vacuum as needed.

– You should have at least 1 but preferably 2 sediment screens (in increasing mesh count /
decreasing micron size) in your system. Your final mesh count should be in the range of 60 to 100
(depending on sprinkler nozzle type) before the water gets to any sprinkler heads. The frequency
which these screens need to be flushed and disassembled for cleaning depends on the amount of
sediment in the incoming water supply, and how often and for how long you water.

– A properly functioning sediment screen setup should not allow any sediment to get to your
sprinkler heads (at least not anything big enough to plug them up). Sprinkler heads plugging up (in a
properly designed system) is an indication that there is sediment bypassing the screen elements;
possibly through a hole in the screen or a leaky or missing O-ring.

Thank You, for taking the time and interest in protecting and maintaining your irrigation system.
We have 312 homes in our HOA. Each and all are connected to our distribution system via
individual standpipe and shutoff valve. One bad valve disrupts the water supply to the entire HOA.

– If you are still having issues, or have general questions, please let us know and one of us would be
glad to see how we can help.