Toilet seat fitting types
By Tom Drake | 11th February 2026 | 3 min read
Key points:
- Bottom-fix toilet seat fittings are secured from underneath the toilet pan.
- Top-fix toilet seat fittings are secured from above the pan, ideal for toilets where the area underneath can’t be accessed.
- Top-fix fittings are usually easier to install.
Bottom-fix toilet seat fittings
Bottom-fix toilet seat fittings are secured from underneath the toilet pan. The bolts drop through the two fixing holes and are then tightened from below, usually with a nut.
Bottom-fix toilet seat fittings are suitable for toilets where you can access the fixing holes from underneath. This is usually the case with open-back close-coupled toilets and traditional toilets.
If you can’t access the area underneath the fixing holes, which is common with back to wall and wall hung toilets, you won’t be able to install a bottom-fix toilet seat.
Bottom-fix toilet seat fittings are stable and often offer more room for adjustment than top-fix fittings. However, they can be trickier to install, especially if there’s limited space around your toilet.
Top-fix toilet seat fittings
Top-fix toilet seat fittings are installed above the toilet pan. The bolts are inserted into the two fixing holes and then secured from above, usually with a screwdriver.
Top-fix fittings are usually used on toilets where there's no access to the area underneath the seat fixing holes, such as back to wall, wall hung, and closed-back close-coupled toilets.
Top-fix toilet seat fittings are often easier to install than bottom-fix fittings, especially in bathrooms where space is limited.
Quick-release toilet seat fittings
Quick-release toilet seat fittings are designed to make cleaning your toilet easier.
They feature a button that allows you to lift the seat off the toilet without needing to unscrew the fittings. This means you can easily remove your toilet seat to give your toilet a deep clean, then simply place it back on top.
Toilet seat fittings FAQs
How do I know which toilet seat fittings I need?
Which toilet seat fittings are easiest to install?
What type of fittings do soft close toilet seats have?