8 Essential Tools for Winterizing a Lake House Outdoor Shower and Spa

As autumn leaves settle on the dock and the lake breeze turns crisp, the time comes to secure your waterfront retreat against the coming freeze. Neglecting the outdoor shower and spa can lead to ruptured pipes, cracked acrylic, and costly spring repairs that delay your first weekend back on the water. Equipping yourself with the right tools ensures your seasonal oasis remains protected through the harshest winter months.

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Why Winterizing Lake House Water Systems Matters

Water expands by approximately nine percent when it freezes, exerting immense pressure that easily ruptures copper, PEX, and PVC pipes. In an exposed outdoor shower or a standalone lakefront spa, even a tiny amount of trapped water can split valves, crack manifolds, and ruin expensive heating elements. When spring arrives, these hidden damages reveal themselves as costly, catastrophic leaks that ruin your opening weekend.

Lake houses are particularly vulnerable because they are often left unattended for months in areas prone to extreme temperature drops. Winds whipping off the open water accelerate the cooling process, forcing temperatures inside uninsulated structures down faster than inland properties. Investing a weekend in thorough winterization safeguards your recreational investment and preserves your water systems for years of trouble-free use.

Air Compressor – Porter-Cable C2002 Pancake

Clearing every drop of moisture from your plumbing lines requires a reliable source of pressurized air. Gravity draining alone leaves water trapped in low spots and elbow joints, which will inevitably freeze and split the pipes. A dedicated air compressor forces this stubborn water out of the lines, providing the ultimate insurance policy against winter pipe damage.

The Porter-Cable C2002 Pancake Compressor is the ideal choice for lake house maintenance due to its highly portable 6-gallon tank and 150 PSI maximum pressure. This unit delivers plenty of volume to purge long pipe runs without constantly cycling, and its oil-free pump requires zero maintenance in cold climates. Its compact footprint means it stores easily in a lakeside shed or crawlspace.

• Tank Size: 6 gallons
• Max Pressure: 150 PSI
• Weight: 30 lbs
• Pump Type: Oil-free for durability and low maintenance

Before firing it up, adjust the pressure regulator down to a safe level—typically between 35 and 50 PSI—to avoid blowing out plumbing joints or shower cartridge seals. This compressor is perfect for DIY homeowners who want a dependable, multi-use tool for winterization, tire inflation, and pneumatic tools, though it may be overkill if you only have a single, short shower line to clear.

Blowout Plug – Camco 36143 Brass Quick Connect

Connecting an air compressor hose directly to a standard garden hose thread or shower inlet requires a specialized adapter. A high-quality blowout plug creates an airtight seal, allowing the compressed air to flow directly into the plumbing without leaking at the connection point. Without it, you cannot build the sustained pressure needed to clear the lines completely.

The Camco 36143 Brass Quick Connect Blowout Plug stands out because of its rugged lead-free brass construction, which resists cross-threading and corrosion much better than cheap plastic alternatives. The quick-connect design snaps directly into standard compressor hose couplers, saving you from fumbling with threaded adapters in the cold. It screws securely into standard 3/4-inch garden hose threads, which are common on spa inlets and outdoor shower hookups.

• Material: Lead-free brass
• Connection Type: Standard quick-connect plug to 3/4-inch male garden hose thread
• Durability: Corrosion-resistant for damp lakeside environments

Ensure you apply a wrap of thread tape to the threads before screwing it in to guarantee an airtight seal. This tool is an absolute necessity for anyone using an air compressor to winterize, but it won’t work on non-standard pipe sizes without intermediate adapters.

RV Antifreeze – Star brite Non-Toxic Antifreeze

Even after blowing out the lines, small amounts of water can pool in P-traps, shower drains, and spa pumps. Pouring a specialized, non-toxic antifreeze into these areas lowers the freezing point of the remaining liquid, preventing it from expanding and cracking plastic housings. Never use automotive antifreeze, which is highly toxic to local wildlife and lake ecosystems.

Star brite Non-Toxic Antifreeze is formulated specifically for marine and RV freshwater systems, offering robust protection down to -50 degrees Fahrenheit. This propylene glycol-based formula is completely biodegradable and safe for PEX, copper, and plastic plumbing. It contains corrosion inhibitors that keep your pump seals and metal valves lubricated and protected throughout the off-season.

• Base: Propylene glycol (non-toxic, biodegradable)
• Temperature Rating: Protected down to -50°F (-46°C)
• Compatibility: Safe for PEX, PVC, copper, and brass fittings

Keep in mind that this antifreeze must be used at full strength, as mixing it with standing water in the lines will dilute its effectiveness and raise the freezing point. It is an indispensable safety net for any lake house owner, particularly those with below-ground plumbing or complex spa drainage systems.

Submersible Pump – Wayne VIP50 Utility Pump

Relying on a spa’s built-in gravity drain to empty hundreds of gallons of water is an exercise in patience that can take hours. A high-capacity submersible pump clears the hot tub in a fraction of the time, allowing you to complete your winterization checklist before the weather turns nasty. It also extracts water from low-lying equipment bays or flooded footwells.

The Wayne VIP50 Utility Pump features a powerful 1/2 HP motor capable of moving up to 2,500 gallons per hour, making quick work of even the largest multi-person spas. Its durable, corrosion-resistant thermoplastic construction is designed to handle damp, outdoor environments without rusting. Crucially, it draws water down to within 1/8 inch of the surface, leaving minimal residual liquid to vacuum out manually.

• Motor Power: 1/2 HP
• Flow Rate: Up to 2,500 GPH
• Discharge Size: 1-1/4 inch high-flow discharge with a 3/4 inch garden hose adapter
• Minimum Draw: Pumps down to 1/8 inch

While it comes with a garden hose adapter, using a wider 1-1/4-inch discharge hose maximizes the flow rate and cuts drain time in half. This pump is a must-have for spa owners who want to avoid freeze damage in the plumbing lines that gravity drains miss, but it is less necessary for basic, single-line outdoor showers.

Wet/Dry Vacuum – Ridgid HD1200 Professional

An air compressor pushes water forward, but a powerful wet/dry vacuum pulls water out of tight spaces like spa jets, skimmers, and shower drains. This dual-action approach ensures no stubborn pockets of water remain trapped in the internal manifolds of your hot tub. It is also the fastest way to dry out the bottom of the spa shell after pumping it dry.

The Ridgid HD1200 Professional Wet/Dry Vacuum delivers incredible suction with its 5.0 peak HP motor, which is essential for pulling heavy columns of water out of deep plumbing lines. The 12-gallon drum provides ample capacity so you do not have to stop and empty it constantly during the process. Additionally, the built-in drain port at the bottom of the drum makes emptying the collected water effortless.

• Capacity: 12 gallons
• Motor Performance: 5.0 peak HP
• Hose Diameter: 2-1/2 inches (prevents clogging from lake debris)

Always remember to remove the paper dust filter before using the vacuum to suck up water, as getting the filter wet will ruin it. This heavy-duty vacuum is perfect for owners of large, multi-jet spas who need commercial-grade suction, though a smaller, more portable vacuum might suffice for a basic outdoor shower setup.

Spa Cover Cap – Covermates Square Hot Tub Cap

Heavy winter snow, ice accumulation, and freezing rain can warp, crack, or waterlog a standard vinyl spa cover over the winter. A dedicated cover cap fits over your existing hard cover, acting as an impermeable shield that sheds moisture and prevents ice from binding to the vinyl. This simple layer of defense extends the lifespan of your expensive hard cover by several seasons.

The Covermates Square Hot Tub Cap is constructed from heavy-duty polyester featuring a waterproof backing that stops moisture in its tracks. The elastic hem ensures a snug, custom-like fit around the perimeter of your spa, preventing high lake winds from catching the edges and ripping it off. It is designed specifically to withstand freezing temperatures without cracking or becoming brittle.

• Material: Heavy-duty waterproof polyester
• Sizing: Available in multiple square sizes (e.g., 80×80 to 96×96 inches)
• Attachment: Elasticized hem with tension drawcord

Measure your existing hard cover carefully before purchasing, including the skirt length, to ensure full coverage. This cap is an essential investment for anyone in high-snowfall regions, but it is not intended to replace a structural hard cover; it must be used in tandem with one to support the weight of the snow.

Strap Wrench – Ridgid 31360 Model 5 Wrench

Winterizing a spa requires loosening the large plastic unions on the pumps and heater to allow water to drain completely from the equipment bay. Standard metal pipe wrenches or channel locks will easily chew up, crack, or deform these plastic fittings. A strap wrench distributes pressure evenly around the entire circumference of the fitting, allowing you to loosen tight connections without causing cosmetic or structural damage.

The Ridgid 31360 Model 5 Strap Wrench features a polyurethane-coated nylon strap that provides an exceptional grip on polished plastic, copper, and PVC pipes. The rugged cast iron handle provides excellent leverage, allowing you to break frozen or over-tightened connections loose with minimal effort. With a strap length of 29-1/4 inches, it easily accommodates large-diameter spa plumbing fittings up to 5 inches.

• Strap Length: 29-1/4 inches
• Pipe Capacity: Up to 5 inches (outer diameter)
• Handle Material: Cast iron

There is a slight learning curve to threading and tensioning the strap properly to prevent slipping, especially when working in tight, cold spa cabinets. This specialty wrench is an indispensable tool for anyone servicing their own spa plumbing or delicate outdoor shower fixtures, saving you from costly replacement parts caused by tool damage.

Thread Seal Tape – Dixon Valve TFE100 PTFE Tape

When you remove drain plugs, showerheads, or union fittings during winterization, the original thread seal is broken. Reinstalling these components in the spring—or securing blowout plugs in the fall—requires a fresh, reliable seal to prevent pressurized air or water from escaping. High-quality PTFE tape fills the microscopic gaps between mating threads, ensuring a leak-free connection.

Dixon Valve TFE100 PTFE Tape is a premium, high-density thread seal tape made from 100% pure polytetrafluoroethylene. Unlike cheap, thin tapes that shred and bunch up during installation, this professional-grade tape wraps smoothly and conforms tightly to the threads. It is highly resistant to water, chemicals, and extreme temperature fluctuations, making it perfect for exposed outdoor plumbing.

• Material: 100% PTFE
• Width: 1/2 inch (standard for most plumbing threads)
• Density: High-density formulation for superior sealing

Always wrap the tape in the clockwise direction (the same direction you tighten the fitting) to prevent it from unravelling as you screw the joint together. Keep a few rolls of this inexpensive tape in your winterization kit; it is a universal necessity for every lake house plumbing task.

Step-by-Step Guide to Blowing Out Shower Lines

Begin by locating and closing the dedicated indoor shut-off valve that supplies water to the outdoor shower. Once the water source is isolated, open the outdoor shower valves (both hot and cold) to let any gravity-fed water drain out. Leave these valves open for the remainder of the process to allow the compressed air to escape freely.

Thread your brass blowout plug into the shower’s main water inlet or lower drain connection. Set your air compressor regulator to a safe pressure of 35 to 45 PSI; exceeding 50 PSI can rupture internal shower cartridges or push-fit plumbing connections. Connect the compressor hose to the blowout plug and turn on the air supply to begin purging the lines.

Alternately open and close the hot and cold shower valves, allowing the compressed air to force mist and residual water out of the showerhead. Continue this process until only dry air exits the fixtures. Finally, disconnect the air supply, remove the showerhead to store it indoors, and pour a splash of non-toxic RV antifreeze down the shower drain trap to protect it from freezing.

How to Protect Spa Jets and Acrylic from Freezing

Simply draining a spa leaves a significant volume of water trapped inside the complex network of plumbing lines feeding the massage jets. To clear these hidden pockets, use your high-power wet/dry vacuum in blower mode, placing the nozzle directly against the skimmer intake and the filter returns to push water toward the jets. Switch the vacuum to suction mode and hold it over each individual jet face to pull out any remaining moisture.

Once the plumbing lines are dry, focus on the spa shell itself. Use the wet/dry vacuum to extract the remaining puddle of water at the very bottom of the footwell, as standing water can freeze, expand, and crack the acrylic shell. Wipe down the entire interior surface with a microfiber cloth to remove residual moisture, oils, and biofilm that can stain or degrade the acrylic over the winter.

Finally, place moisture-absorbing canisters inside the spa cabinet to prevent mildew growth on the electrical components and pump motors. Secure the hard cover and pull the waterproof cover cap over the top, securing the straps tightly. This multi-layered barrier keeps out melting snow, ice, and wind-driven rain, ensuring the delicate acrylic shell remains pristine until spring.

Essential Spring Recommissioning Steps to Remember

When the spring thaw arrives, reversing your winterization steps carefully is crucial to avoid damaging your water systems during start-up. Begin by removing the outer cover cap and inspecting the spa cabinet and outdoor shower area for any signs of pest intrusion or shifting structural supports. Wipe down the spa shell once more to clear any dust or debris that accumulated during the off-season.

Before turning on the water supply, inspect all plumbing unions, drain plugs, and shower connections. Reinstall any plugs removed during the winter, ensuring you apply fresh PTFE thread tape to the threads to prevent slow drips. Check all rubber O-rings and gaskets for cracking or flattening, replacing any that feel brittle with new, lubricated seals.

Open your indoor water supply valve slowly to gradually pressurize the outdoor shower lines, checking constantly for any spray or leaks along the run. For the spa, flush the lines thoroughly with fresh water to purge any residual RV antifreeze before filling the tub completely. Once filled and leak-free, balance the water chemistry and fire up the heater to begin another season of lakeside relaxation.

Conclusion

Taking the time to properly winterize your lake house outdoor shower and spa pays massive dividends in peace of mind and saved repair costs. With the right tools and a systematic approach, you can confidently close up your waterfront retreat knowing it will be ready to perform when the warm weather returns.