Truma AquaGo Filter O-Ring Kit 77000-00250 Water Heater Cartridge Seals | 2 rubber O-rings replace worn housing gaskets to stop leaks; fits AquaGo tankless RV, camper, boat systems; tool-free swap

"Water dripping from around the filter cartridge on your Truma AquaGo hot water heater almost always traces back to the same culprit: the two small O-rings that seal the filter housing have gone hard, flat, or cracked from months of pressurized water and repeated cartridge changes. This Truma AquaGo Filter O-Ring Kit replaces exactly those seals, restoring the watertight fit the system needs without touching any other part of the heater. The kit contains 2 O-rings engineered for the AquaGo filter cartridge, part number 77000-00250. Because this is the genuine Truma-specified seal size, it drops into the same groove as the originals -- no measuring, no guessing at a generic hardware-store O-ring that may be a millimeter off and either won't seat properly or won't hold pressure. If you're already mid-repair and pulled the old rings out to compare, these are the direct replacement. Installation takes only a few minutes and no tools: remove the filter cartridge, slide the old O-rings off, wipe the sealing surfaces clean, and press the new rubber O-rings into place before reinstalling the cartridge. It's a natural add-on any time you're doing a routine filter change, since the rings see the same wear cycle as the filter itself and are cheap insurance against a leak showing up a few weeks later. This kit is built for the RV, camper van, and boat owners who keep their own Truma AquaGo tankless water heater running -- whether you're doing scheduled maintenance at home, troubleshooting a leak on the road, or a mobile RV tech stocking common wear parts. Keeping a spare set of O-rings with your filter cartridges means a small, inexpensive seal never turns into a soaked cabinet or a heater that has to be taken offline until parts arrive. Replacing these O-rings at every filter change, or as soon as you notice moisture around the filter housing, is the simplest way to keep your AquaGo's filtration system sealed tight and your hot water running without interruption."

• Stops the slow drip at the filter housing: worn or hardened O-rings are the #1 cause of leaks around the AquaGo filter cartridge, and this kit gives you fresh, properly sized rings to reseal it.
• Made specifically for the Truma AquaGo hot water heater filtration system, part number 77000-00250; this is not a universal fit, so you get the exact seal geometry Truma engineered for this filter.
• Kit includes 2 O-rings sized for the AquaGo filter cartridge cap and housing; no tools or plumbing experience needed, just pull the old rings and press these into the same groove during a filter change.
• Durable rubber construction holds up to repeated cartridge swaps and continuous exposure to pressurized water inside the heater, so the seal stays watertight instead of cracking after a season of use.
• Built for RV, camper, and boat owners who service their own Truma AquaGo system; keep a spare set in your parts bin so a brittle O-ring never turns a routine filter change into a mid-trip leak repair.