Dometic 385312073 310 Series Slow-Close Toilet Seat

If the seat or lid on your Dometic 310 Series toilet cracked, warped, or just wore out, this is the factory replacement that drops right back on. It's the genuine Dometic 385312073 seat and cover assembly, built for the round, closed-front 310 gravity-flush toilet you'll find in thousands of boats and RVs. White finish, enamelled wood, slow-close lid. Same part the toilet shipped with.

The 310 Series is a residential-style head. Full-size bowl, comfortable sit, and this seat is a big part of why. It's real wood with an enamel coating, not thin hollow plastic. Wood holds heat, so you're not sitting down on something ice-cold on a chilly morning at anchor. And it feels solid under you, which matters more than people admit until they've used a flimsy one.

The slow-close hinge is the other reason to go genuine here. Push the lid and it settles down on its own, quiet and controlled, instead of slamming. On the water that's not just about noise. A lid that drops hard in a following sea eventually cracks at the hinge, and a slam at 2 AM wakes the whole boat. This damper takes that out of the equation.

Fitment is specific, so read this part. This seat is made for the Dometic 310 Series round, closed-front bowl running gravity flush. That's the ceramic residential-height 310 you'll see in a lot of newer boats and coaches. It is not made for elongated residential bowls, and it isn't the right seat for the taller or differently-shaped bowls in other Dometic series. If your bowl is round and your toilet is a 310, you're in the right place. If you're not sure which model you've got, check the base of the toilet or the original paperwork before you order.

Install is a straightforward bolt-on. The seat mounts through the two holes at the back of the bowl with the supplied hardware. Most folks have it done in ten or fifteen minutes with basic hand tools. One tip from boaters who've done it: measure your existing mounting bolts before you toss them. A few 310 installs sit deeper than a standard household toilet, and the odd setup does better with slightly longer bolts. Check the fit before you torque anything down.

A word on living with a wood seat in a marine head. Wood is comfortable and warm, but it doesn't love a damp, closed-up compartment. If your head has poor ventilation, wipe the seat and the hinge area dry after use, especially at the closed front where moisture likes to collect. Do that and the enamel finish holds up for years. Ignore it and any wood seat, this one included, will eventually show it. For the slow-close damper, a light shot of silicone lube now and then keeps salt air from stiffening the mechanism. Small habits, long life.

Who's this for? Anyone with a 310 Series toilet who wants the exact factory seat back, no guessing on fit, no adapter kits. Boat owners, RV owners, anybody replacing a broken lid or a tired seat. It pairs naturally with the rest of the 310 base and hardware for a clean, sealed setup. And because it's the genuine Dometic part, it lines up with the bowl the way an aftermarket seat often won't.

What it's not: it isn't an elongated seat, it isn't a fix for a cracked bowl, and it won't turn a different toilet into a 310. It's one thing, done right. The correct seat and cover for your 310, ready to bolt on.

Bottom line, if you own a 310 and the seat's seen better days, this is the simple, correct fix. No adapters, no guesswork on which bolt pattern you need, no settling for a seat that almost fits. It's the genuine part, it lines up the first time, and it brings the quiet slow-close action back to your head. Order the one you know fits and be done with it.