Flush-Safe is a water meter specifically designed for RV tank flushing and filling. It automatically and precisely delivers a preset number of gallons, then shuts off—preventing overflows and eliminating the need for manual monitoring. Unlike timers, Flush-Safe measures gallons of water, not time, for far greater accuracy and peace of mind.

Flush-Safe was developed by an experienced RVer traveling the lower 48 states and Canada over the last four years and camping at hundreds of sites. After personally overfilling the black tank on at least two occasions—once due to distraction and once due to a failed tank sensor—it became clear there had to be a better solution. Many RVers admit that black tank overflows are almost a “rite of passage.” Tank sensors are notoriously unreliable, Many have turned to garden timers or digital meters as workarounds— but most find them inaccurate, unreliable, and ultimately more trouble than they’re worth. That’s exactly why we developed Flush-Safe: a purpose-built, water meter designed for RV use—accurate, automatic, and engineered to take the guesswork out of tank flushing. Curious how Flush-Safe came to be? Read Our Story to see how one RVer’s experience turned into a smarter tank-flushing solution.

A digital water meter can show you how many gallons have passed through it—but it doesn’t shut off automatically. You still have to stand by and monitor the flow, manually turning off the water at the right time. That means you're just trading one chore for another. Flush-Safe, on the other hand, is a preset water meter that automatically shuts off once the selected amount of water has been delivered. No guesswork, no hovering by the hose, and no risk of overfilling if you get distracted.

Sprinkler and garden timers measure time, not gallons. They’re designed to shut off after a set duration, but they can’t accurately control how much water is delivered—especially with fluctuating water pressure. Even models that claim to measure gallons are still time-based and just as inconsistent. You could try timing the fill at each new campground and adjusting your timer accordingly—but most RVers have better things to do than run water tests at every stop. If you’re busy breaking camp or getting back on the road, babysitting a timer isn’t going to cut it. Flush-Safe eliminates the guesswork by measuring the actual gallons dispensed and shutting off automatically—so you can get back to your travels without the mess.

Definitely! Since Flush-Safe measures gallons—not time—you can use it to flush gray tanks just as easily.

Most RVs don’t have an external fill connection for the gray tank like they do for the black tank—but you can still use Flush-Safe to flush your gray tank internally. Simply empty the gray tank and close the valve. Then connect a hose to Flush-Safe, set it to your desired output. Place the hose in a sink or shower drain. Turn on the water and let Flush-Safe do the rest. Caution: Make sure the hose is secure and won’t jump out of the sink or drain during filling.

Absolutely! Flush-Safe is safe for potable water use. All materials are non-toxic and noncorrosive. If you are concerned about cross-contamination, consider buying a second unit dedicated to freshwater use.

Flush-Safe uses standard garden hose fittings, making it compatible with typical RV water systems. Simply connect one hose from your water source to the inlet side of Flush-Safe, and another hose from the outlet side to your tank’s flush or fill port. For added convenience, we recommend using a short hose and a manual shutoff connector near your water panel to make setup and control even easier.

Flush-Safe is designed to be maintenance-free under normal use. However, if you’d like to sanitize it periodically — especially if using for freshwater filling — we recommend one of the following safe cleaning methods: Diluted bleach solution: 1 teaspoon of household bleach per gallon of water. Let sit for 15–30 minutes, then rinse thoroughly. White vinegar: Use a 1:1 mixture with water. Let sit briefly, then rinse completely. Pure sodium percarbonate: Mix 1–2 tablespoons in a gallon of warm water. Let sit for up to 30 minutes, then flush several times with potable water. RV-safe cleaning products: Use cleaners labeled for potable water systems. Always follow label instructions. Be sure to rinse thoroughly and allow Flush-Safe to dry completely before storage. Only use mild cleaners that are safe for water system components. Avoid harsh household chemicals not intended for RV or potable water use.

Flush-Safe is engineered for long-term reliability and consistent performance. The internal mechanisms, including the precision gear system and valve assembly, are designed to deliver accurate water metering and dependable operation over many years of typical RV use. All critical components are constructed with high-quality, corrosion-resistant materials, and the housing is sealed against leaks with UV-stable, non-toxic plastics. Flush-Safe has been tested under real-world conditions, including extended high-pressure exposure and repeated cycling, to ensure it withstands normal use over multiple seasons. Replacement parts such as knobs and hose gaskets are also available through our website to help keep your Flush-Safe operating smoothly for years to come.

Back pressure refers to resistance to water flow after it passes through Flush-Safe — caused by downstream fittings, valves, or piping. Flush-Safe operates using the pressure difference between the inlet and outlet to accurately count gallons. If there is significant back pressure, the force of the incoming water jet that drives the internal gear mechanism can be reduced, which may slightly affect the volume registered at shut-off. While the metering remains consistent under steady conditions, different pressure environments — including back-pressure or well-water systems with fluctuating inlet pressure — may cause some variation compared to a constant-pressure supply. For best results, Flush-Safe should be used in systems with uniform downstream restrictions and relatively stable water pressure.

No, offers cannot be combined. Only one discount code or promotional offer can be applied per order.

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Yes! If you need to make a change or cancel your order, send us an email at info@flushsaf.com, and we’ll take care of it promptly. We’re here to help.

We typically process orders within 1–2 business days (Monday through Friday, excluding holidays). Please note that we are currently quoting 4–6 weeks for delivery due to high demand. While we strive to meet or exceed this timeline, supply chain delays can sometimes affect fulfillment. Once your order ships, you’ll automatically receive a confirmation email with tracking information. We ship all orders via UPS Ground at this time. Thank you for your patience as we work hard to deliver your order as quickly as possible.

All orders are currently shipped via UPS Ground. You’ll receive a tracking number by email once your order is on the way.

Not at this time, but we’re working on it! We may offer expedited options in the future as we continue to grow. Stay tuned!

We currently ship within the U.S. and Canada. Shipping to other countries isn’t available yet, but it’s something we’re exploring for the future. Stay tuned!

We want you to be happy with your purchase. If you're not satisfied, you may return your Flush-Safe within 30 days of delivery for a full refund, excluding shipping. To be eligible for a return: The item must be unused and in its original packaging All components must be included and undamaged To start a return, please contact us at info@flushsaf.com to request a Return Merchandise Authorization (RMA). Returns sent without an RMA may not be accepted. Return shipping costs are the responsibility of the customer unless the product is defective or the return is due to our error. Once we receive and inspect your return, a refund will be issued to your original payment method. Note: This policy applies to direct purchases from our website only. Warranty-related issues are handled separately under our Warranty Policy.

Flush Safe, LLC warrants that your Flush-Safe product will be free from defects in materials and workmanship under normal use for a period of one (1) year from the date of original retail purchase. This limited warranty covers: Manufacturing defects in materials and assembly Product failures resulting from normal use under recommended operating conditions This warranty does not cover: Damage caused by misuse, abuse, neglect, or accident Unauthorized modifications, disassembly, or repair Improper installation or failure to follow the included instructions Normal wear and tear or cosmetic damage Water damage resulting from improper use or installation If a defect arises during the warranty period, Flush Safe, LLC will, at its discretion: Repair the product using new or refurbished parts, or Replace the product with a new or refurbished unit, or Refund the original purchase price of the product How to Obtain Warranty Service To obtain warranty service, you must provide proof of purchase and contact us at: service@flushsaf.com. Flush Safe, LLC reserves the right to inspect the product and determine the validity of the claim. Shipping costs may be the responsibility of the customer. Limitations This limited warranty is the sole and exclusive warranty provided by Flush Safe, LLC. To the extent permitted by law, all implied warranties are limited in duration to the warranty period stated above, and liability is limited to the purchase price of the product.

To obtain warranty service, you must provide proof of purchase and contact us at: service@flushsaf.com.

If you love what Flush-Safe offers and think your audience would too, we’d be excited to work with you. To learn more about our affiliate program and how you can help promote a product making a real impact in the RV community, just send us a message at info@flushsaf.com.

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