How to Winterize RV Water System - Guide to Winterizing Camper

How to Winterize RV Water System - Guide to Winterizing Camper

As the vibrant hues of autumn gradually give way to the serene, snow-blanketed landscapes of winter, RVers must prepare for a seasonal transition that comes with its own unique set of challenges, one of them is winterizing travel trailer water system. Ensuring your camper is adequately protected against freezing temperatures is essential to prevent costly damage and maintain its pristine condition.

Winterizing an RV water system involves a series of steps that protect pipes, tanks, and fixtures from the ravages of freezing temperatures. Neglecting this process can result in cracked pipes, burst water heaters, and extensive repairs, not to mention the inconvenience of having no running water during your travels. You can embark on winter adventures without fear, knowing that your camper is ready to face the chill head-on.

For an additional tip on staying winter-ready, you can also prepare the heated water hoses in the winter, which can be a game-changer in ensuring a continuous and thawed water supply during those freezing months. You can find the article "What Is The Best Heated Water Hose for My RV"

Why RV Water System Need to Winterize

Campers are inherently vulnerable to freezing damage because their plumbing systems lack the insulation and climate protection of houses. Trailer pipes, seals, pumps, tanks, and fixtures are not engineered to be subjected to frozen water swelling inside for months on end. Once temperatures drop below freezing for extended periods during winter storage, the results of ice expansion within the water system can be catastrophic.

As water freezes and expands, it places immense pressure on plastic pipes and fittings, often leading to ruptures or cracks as it seeks any escape from the confined space. This can readily burst water lines, crack pump housings, compromise valve seals, and even split entire holding tanks if unchecked ice accumulation occurs. The repairs for this kind of freeze damage are painfully expensive. Replacing busted plumbing lines, damaged pump components, fittings, and even whole tanks can cost thousands and require extensive labor if in difficult to access areas.

A proper winterization can protect vulnerable system parts from freeze expansion damage. By preventing frozen pipes, safeguarding fixtures and appliances, preserving your water tanks, warding off mold and mildew, and extending the overall life of your camper. Preserving your investment through winterization allows it to last for many years.


When Is The Best Time to Winterize Camper?

Determining the optimal time to winterize RV requires balancing several factors. You want to avoid freezing conditions but also maximize your camping season length. Most recommend winterizing in late fall, preferably by early to fall for colder area climates. By preparing in advance and considering the local weather conditions, you can safeguard your trailer's plumbing system and prevent costly repairs down the road.

Prioritize winterizing well before the first frost or freeze warning of the season. Leaving it too late until hard freezes set in puts your water system at higher risk.

Account for how and where the camper will be stored. If kept outdoors or in cold conditions, winterize on the earlier side. An indoor garage allows slightly later winterization. While the specific timing varies by climate and use, target having your RV winterized by mid-November at the latest. Aim to winterize once you've finished any desired fall camping trips and won't be using the trailer for an extended period.

Two Ways to Winterize RV

As the days grow shorter and temperatures begin to plummet, RVers find themselves facing the inevitable seasonal transition: winter. Ensuring your recreational vehicle weathers the cold months without harm is of paramount importance, particularly when it comes to protecting its plumbing system from the potentially devastating effects of freezing temperatures. Fortunately, there are two primary methods for winterizing camper trailer, each catering to different preferences and concerns.

Whether you prefer the tried-and-true method of winterizing with RV antifreeze or lean towards the more eco-friendly approach of using compressed air to expel water from the plumbing system, it will equip you with the knowledge and steps required for a smooth transition into and out of winter.

How to Winterize your RV Using Antifreeze

When winterizing an RV, the most comprehensive protection against frozen pipes and water damage comes from filling the drained plumbing system with non-toxic RV antifreeze. This displaces any remaining water in the pipes, tanks, and appliances, so expanding ice has no space to form cracks and splits. Though it requires carefully flushing antifreeze through the entire water supply, this method provides the full protection for the system.

This approach involves pumping RV-approved non-toxic antifreeze through the entire plumbing system to displace all water before storage.
First, the fresh water tank, hot water heater, and all lines are fully drained by opening valves and low point drains. Faucets and showers are opened to evacuate water.

Draw antifreeze from a container into the trailer's plumbing lines. The antifreeze is pumped through by opening faucets, valves, and appliances one section at a time, ensuring antifreeze fills every pipe.
Enough antifreeze must be siphoned through to completely displace all water content. The antifreeze then stays in the pipes over winter to keep them from freezing.


How to Winterize without Antifreeze

The antifreeze-free method of winterizing camper using compressed air offers an environmentally friendly and chemical-free alternative for protecting your plumbing system from freezing temperatures. This approach will remove all water from the water system. While it may involve more steps, including the use of an air compressor and draining P-traps, it's a preferred option for those who wish to avoid the use of antifreeze in their RV's plumbing. When executed correctly, this method ensures a smooth transition into and out of winter, preserving your RV's plumbing system and getting it ready for your next adventure, all without the need for antifreeze.

Winterizing a trailer without antifreeze involves using compressed air to remove all water from the plumbing system.

  1. Bypassing the Water Heater, prevent compressed air from entering it, and then empty the water heater tank.
  2. Turn the water pump on to remove the leftover water. Turn it off when no more water is working through the lines.
  3. Using Compressed Air: Connect an air compressor to your camper water inlet using an adapter, ensuring that the air pressure between 30 and 50 psi. High pressures can damage the plumbing system, so use caution.
  4. Blowing Out the Lines: Open each faucet, valve, and fixture one at a time, allowing the compressed air to force out any remaining water. Continue this process until only air flows from the fixtures, indicating that the plumbing system is void of water.
  5. Drain Traps: To further ensure that no water remains, remove and drain P-traps under sinks and in the shower. This step is crucial to eliminate any trapped water.
  6. Winterization Complete: After all water has been expelled from the system, close all faucets, fixtures, and low point drains. Your trailer is now winterized without the use of antifreeze.

The Tools You Need:

When you choose to winterize travel trailer without antifreeze by using compressed air, you'll need a few essential tools and materials to perform the task effectively.

  • Air Compressor
  • Pressure Regulator: A pressure regulator can control the air pressure supplied by the air compressor.
  • Blow-Out adapter

Is It Better to Winterize with Air or Antifreeze?

Choosing to winterize your camepr without antifreeze using compressed air has several reasons that make it a method for some RVers.

Environmental Concerns: Most RVers prefer to minimize the use of chemicals, even those labeled as non-toxic. Winterizing without antifreeze is a more environmentally friendly option, as it avoids introducing any chemicals into the plumbing system or the environment.

Cost Savings: Using compressed air is cost-effective as it doesn't require purchasing gallons of trailer antifreeze. While the initial investment in an air compressor and any necessary adapters is required, it can pay off over time, especially for frequent RVers.

Avoiding Taste and Odor: Some people are sensitive to the taste and odor of antifreeze, even though it's considered non-toxic. Winterizing without antifreeze ensures there's no potential taste or odor left in the water lines when you de-winterize.

Kohree Winterize Sprinkler System Blowout adapter

The blow-out adapter is an indispensable tool for RV owners opting to winterize their vehicles without antifreeze using compressed air. It plays a pivotal role in creating a secure connection between the air compressor and the camper's plumbing system through the city water inlet, enabling the effective removal of water from the pipes and fixtures while simultaneously preventing any reentry of moisture. This adapter ensures a meticulous and successful winterization process, safeguarding the plumbing system from freezing temperatures, and aligning with the environmentally-conscious and preference-driven choices of RVers who seek to minimize the use of chemicals.

Kohree Winterize Sprinkler System for trailer offers a hassle-free way to ensure that your camper's plumbing is ready to face the winter months head-on. We will introduce the features and benefits of Kohree Winterize Blow Out Fitting Adapter, highlighting how it can help your RV winterization experience.

  • Durable Brass Material

The metal parts of this product are constructed using lead-free, thick brass for maximum durability and longevity. The brass material ensures the product will remain free of rust and withstand corrosion for over 5 years of reliable use. You can trust this product to maintain its integrity thanks to the heavy-duty brass used in all metal components.

  • Wide Adaptability

Kohree Winterize Sprinkler System BlowOut Fitting Adapter features a flexible, high pressure hose rated up to 300 PSI, ensuring it can handle robust air flow without leakage or damage. The standard 1/4" industrial interchange compressor fitting allows for a universal connection to any air compressor attachment commonly found across the USA. It also comes equipped with commonly used 3/4" male and female garden hose connectors that effortlessly pair with most RV air lines. The bendable hose design reaches tight spaces while also minimizing stress on pipes and fittings during use. 


  • Health and Environmental Protection

It is completely BPA free, ensuring no harmful plastics or chemicals will leach into your RV's plumbing system during use. You can have peace of mind knowing this hose will not transmit any unwanted plastic odors or tastes into RV plumbing.

  • Multipurpose

It is typically used to winterize camper, watercraft, garden hoses, campers, boats, and travel trailers. The fitting with the female garden hose end is typically used to winterize sprinkler systems, garden hoses, and outdoor plumbing. The fitting with the female garden hose end is typically used to underground irrigation sprinkler systems, outdoor pipes, water lines, plumbing, homes, cabins, faucets, spigots, garden hoses, sillcocks, and hose bibbs by air compressor blowout method, buy one get most of winterization accessories.



Winterizing your RV is a crucial step to protect your vehicle's plumbing system from the potentially damaging effects of freezing temperatures. As the seasons change and winter approaches, taking proactive measures to ensure your camper is ready to face the cold can save you from costly repairs and ensure your home on wheels is in tip-top shape for your next adventure. Whether you opt for the traditional method of using RV antifreeze or choose the more eco-friendly route of winterizing without antifreeze using compressed air, the key is to be thorough, attentive to detail, and well-prepared.

With the right approach and the proper tools, you can ensure that your RV's plumbing system remains intact, well-protected, and ready for your next adventure, no matter the season. So, as winter approaches, remember that proper winterization is your ticket to a worry-free and enjoyable trailer experience all year round.

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