Thetford Aqua-Magic V Blade Seal, Part 31708 (Single)

The Thetford blade seal is what keeps your Aqua-Magic V toilet holding water in the bowl. When the bowl starts draining down between flushes, this is the worn part behind it. It's the genuine part 31708, one seal per package, and it's a quick, inexpensive fix. If your Aqua-Magic V toilet won't hold water in the bowl anymore, this blade seal is almost always the culprit. It's the seal that sits against the flush blade at the bottom of the bowl, and it's what keeps water where it should be between flushes. Over time it dries out, cracks, or gets chewed up by mineral buildup. Then you get that slow drain-down that lets tank odor creep back up into the bathroom. This is the genuine Thetford replacement for the Aqua-Magic V permanent RV toilet, part 31708. One seal per package. It drops into the same spot the old one came out of, so there's no special tooling and no trip to the shop. If you can get to the base of the bowl, you can swap it in a few minutes. We'd keep a spare in the RV or on the boat. It's a cheap part that saves a lot of grief when the old one finally lets go. Key Features Genuine Thetford blade seal for the Aqua-Magic V permanent toilet, part 31708 Restores the bowl's water seal so it holds water between flushes and keeps odor down Single seal per package Drops into the factory location, no special tools needed for the swap Direct OEM replacement that keeps your toilet working the way it did new Why Buy from NVN Marine Authorized Thetford Marine reseller, full manufacturer warranty NMEA member and ABYC certified, advice from real boat techs Same-day shipping before 3 PM ET on in-stock items NY headquarters and Fort Lauderdale flagship retail store Frequently Asked Questions What does this blade seal do? It seals against the flush blade at the base of the Aqua-Magic V bowl so water stays in the bowl between flushes. When it wears out, the bowl drains down and lets tank odor back in. Which toilet does part 31708 fit? The Thetford Aqua-Magic V permanent RV toilet. It's the factory replacement seal for that model. How many seals come in the package? One. This is a single blade seal. Is this a genuine Thetford part? Yes. It's the OEM Thetford replacement, part number 31708. Why won't my bowl hold water? A worn or cracked blade seal is the most common reason. Replacing this seal usually fixes it. Technical Specifications Title Thetford Aqua-Magic V Permanent Toilet Blade Seal Brand Thetford Manufacturer Part Number 31708 UPC 028985317081 Model Compatibility Aqua-Magic V Permanent Toilets Type Blade Seal Quantity Single (1)