Swimming pools are an excellent way to stay active and have fun in the summer, but if you live or operate a swimming pool in a colder climate, there comes a time at the end of the swimming season when pools must be winterized. Not winterizing a pool in a colder climate is simply not an option, unless you want a hefty repair bill come spring.
The power of water when it freezes and thaws is absolutely amazing. In colder climates, like Canada for instance, pools that are not properly winterized will experience all kinds of damage, such as cracked and broken pipes, pumps and filters.
In addition to winterizing the entire mechanical system for the pool, the pool shell itself requires protection against frost. The simplest way to protect a pool shell is to leave it full of water for the winter. When filling the pool for a winter hibernation, care should be taken to allow room for the water to rise with rain and snow. Typically the water level in a pool is left 12-18" from normal operating level at the time of winterizing.
To complete the winterizing, the pool should be completely drained, and compressed air used to blow out water from the recirculation piping. All returns, water inlets, drains, etc. need to be capped or plugged to keep water out. Play features in pools also need to have all the water removed from them and in some cases some water features will need to have antifreeze introduced into them to prevent low lying fittings from collecting water and freezing. Items such as skimmers should also have expansion devices installed to prevent these items from damage due to freezing expansion. Once all of the piping has been cleared of water and properly sealed up, the pool shell can then be filled and chemicals added. Items such as pumps, filters and heaters in the mechanical room also need to have all drain ports opened up and drain plugs removed.
When winterizing a pool, it is imperative that the time is taken to do it properly, in order to avoid any future damage and additional repair costs to the facility. Taking the proper steps can not only help preserve the condition of the pool tank and the mechanical equipement, but these simple steps can also help increase the longevity of the grounds, building, and deck equipment. Here are some tips to closing a swimming pool, recommended by the National Swimming Pool Foundation.
- Adjust the chemical balance of the pool water to the recommended levels.
- Treat Facility water with appropriate products to minimize algae, bacteria, or damage to surfaces.
- Clean and vacuum the pool.
- Empty and store skimmer baskets and hair and lint traps for the winter.
Backwash the filter thoroughly and clean the filter media or elements.
- Drain sand filters. Remove cartridges or D.E. filter elements, inspect for tears or excessive wear, and store.
- Lower the water level to below the skimmers and return lines for plaster pools. If needed, remove the remaining water from the recirculation lines using an air compressor or industrial type tank vacuum cleaner.
- Open all pump room valves and loosen the lid from the hair and lint skimmer. However, if the filter is below pool water level, close the valves leading from the pool to the filter.
- Grease all plugs and threads.
- Add antifreeze formulated specifically for recreational water applications to the pipes to prevent bursting. Do not use automotive antifreeze.
- Plug the skimmer or gutter lines. Winterize with antifreeze and expansion blocks. Secure the skimmer lids to the deck to prevent their loss. Plug wall return lines and the main drain.
- Make sure the hydrostatic relief valve is operational.
- Drain and protect pumps. If a pump and motor will be exposed to sever weather, disconnect, lubricate, perform seasonal maintenance of the pump, and store. Add antifreeze to help protect pumps and seals from any residual water left after draining.
- Clean surge pits or balancing tanks.
- Disconnect all fuses and open circuit breakers.
- If underwater wet niche lights are exposed to the elements, remove them from their niches and lower them to the bottom of the pool.
- Drain the pool water heater. Grease the drain plugs and store for the winter.
- Turn off the heater gas supply, gas valves, and pilot lights.
- Install the winter safety cover.
- Properly store any unused chemicals as described on their labels to prevent containers from breaking and the mixing of potentially incompatible chemicals. Dispose of test reagents, disinfectants, and other chemicals that will lose their potency over the winter.
- Disconnect, clean and store the chemical feeder, (Remember - Only Water can be used to clean out the chemical feeders) controllers, and other chemical feed pumps. Store controller electrodes in liquid and in a warm environment.
- Clean and protect pressure gauges, flow meters, thermometers and humidity meters.
- Store all deck furniture (chairs, lounges, tables, umbrellas, etc.) Identify and separate all furniture in need of repair.
- Remove deck equipment, hardware, and non-permanent objects such as ladders, rails, slides, guard chairs, starting blocks, drinking fountains, handicapped lifts, portable ramps, clocks, weird, and safety equipment to prevent vandalism. Store in a clearly marked, identifiable, weather-protected location. Cap all exposed deck sockets.
- Remove the diving boards. Store the boards indoors, upside down and flat so they will not warp.
- Turn off the water supply to restroom showers, sinks, and toilets. Drain the pipes and add antifreeze.
- Remove shower heads and drinking fountain handles. Open hose bibs and fill spouts.
- Inventory all supplies and equipment. Make suggestions for preventative maintenance and repair, upgrading, and needed equipment purchases.
** ALL COMMERCIAL POOLS ARE DIFFERENT – ENSURE YOUR PERSONAL CLOSING PROCEDURES FOR YOUR POOL PRIOR TO COMMENCING WORK.