Fienza Toilet Seats

The Fienza seat on this page

This page lists one Fienza seat, the Fienza Universal UF toilet seat. It is a white seat in a classic D shape, with a soft close action and a quick release so it lifts off for cleaning. The listing says it suits the Fienza Delta and Koko suites, and the box contains the seat and a fixing kit. The listing gives no dimensions or hinge centres, so measure your pan against the specification sheet before you order.

A soft close hinge lowers the seat instead of letting it drop, which prevents slamming and reduces noise. Quick release lifts the seat off for cleaning underneath. For seats from other makers, see toilet seats, and for Caroma pans see Caroma toilet seats.

How to find the correct replacement seat

Measure the ceramic pan, not the old seat, which may have been a compromise fit. You need three numbers. The hinge centres run from the centre of one fixing hole at the back of the pan to the centre of the other. The pan length runs from the front edge of the pan back to the centre line of the hinge holes, and the pan width is the widest point across it. Then check the shape: a D shape has a flatter, squarer front, and an oval has an evenly curved front.

American Standard's seat FAQ gives reference lengths from the bolt holes to the front rim: about 16.5 inches for a round front, roughly 420mm, and about 18.5 inches for an elongated bowl, roughly 470mm. It gives a standard width of about 14 inches, roughly 355mm, and a bolt spacing of 5.5 inches, roughly 140mm. These are US figures in inches and the conversions are approximate, so use them only to see how the three numbers relate. The Fienza listing gives none of these measurements and says only that the seat suits the Delta and Koko suites. If your pan is not a Delta or Koko, ask the supplier whether the seat fits.

Why one seat does not fit every pan

A seat is made for a pan outline and a hinge spacing, which is why the listing says which suites it suits. Fienza's sheets draw each pan's footprint, and the Lillian guide lists the hinge, the seat and the bolts as separate parts. A pan with a squarer front takes a D shape seat, and one with an evenly curved front takes an oval, so check the front of your pan. If the old seat left a gap at the front or overhung the rim, it may have been the wrong shape. Take a photograph of the old seat on the pan from above, and send it with your measurements.

Shape and floor space

A plumbing contractor's guide lists the seat checks as the shape, whether a quick release seat exists for the pan, and the pan's overall size. Real Homes adds that an elongated seat is more comfortable but projects further than a round one, so the shape you choose changes how much floor the toilet uses, and it suggests leaving around a metre of elbow room in front of the toilet. A D shape sits between the two in feel. The Universal UF seat is a D shape, and it suits two named Fienza suites, so check the front of your pan against the shape before you rely on the match.

Top fix and bottom fix

A top fix seat tightens from above and suits a pan where you cannot reach underneath, such as a back to wall toilet. A bottom fix seat has nuts that you tighten beneath the pan. A seat repair guide found by a web search explains the two fixings. Bottom fix bolts pass through the ceramic and are held by a nut and washer under the rim, so you need access from below. Top fix bolts screw into an expanding rubber grommet or sleeve in the hole, so the whole job can be done from above. Buying the wrong type is the most common mistake, the guide says, and if you cannot reach the underside of the bowl's mounting holes, you need a top fixing seat.

On a Fienza back to wall suite the pan sits against the wall, and the hinge plug in the Lillian guide is fitted from above, which is the top fix style. If you are unsure which your pan takes, look at the hinge posts and the holes before you order.

Tightening a loose seat

The same guide gives the fix for a seat that moves. For a bottom fix seat, hold the bolt head still with a screwdriver on top and tighten the nut underneath, taking care not to overtighten and crack the porcelain. For a top fix seat, tighten the top screw, which expands the anchor inside the hole until the seat sits firm. If the seat still shifts, a rubber washer or a replacement for worn plastic washers can fill the gap. The seat should be tight before the hinge covers go on. If a hinge is cracked, the repair is usually a new seat.

How the Fienza quick release seat is fitted

The Lillian guide gives the fitting steps. Take care not to open the lid past 105 degrees before it is fixed to the pan. Remove the screw from the hinge plug, keeping the brass nut inside the plug, and arrange the components as in the diagram. Screw them into place, and the fixing bracket in the plug moves into the horizontal position for a secure fit. Push the seat onto the fixings, adjust it to fit the ceramic well, and tighten the screws, then fix the hinge covers over the hinges and replace the seat. To remove the seat, push the button and lift it straight up. The guide is for the Lillian, so read the one in the box for the Delta or Koko, but the sequence is a good picture of the job. Avoid over-tightening metal against ceramic, which can crack the pan.

What UF means on a Fienza seat

The Fienza sheets for its suites describe the seats as UF quick release, soft close seats, and the listing calls this one the Fienza Universal UF toilet seat. UF stands for urea-formaldehyde, the thermoset resin that duroplast seats are made from. A web search for the difference between seat materials found that UF or duroplast is a thermoset that sets permanently during moulding, which gives a harder, more scratch resistant, ceramic-like surface than polypropylene, a lightweight thermoplastic. One manufacturer data sheet found by the search lists UF as about 67 percent urea-formaldehyde resin and 28 percent cellulose, which is wood fibre. A vendor warns that repeated splashing may cause yellowing and weaken the structure over time. Vendor comparisons also disagree about which material is tougher, so treat any single claim with care. The practical point is the care: wipe splashes off the seat and the hinge area.

The Fienza seat codes in the Lillian parts list

The Lillian installation guide, updated May 2025, lists the seat parts for that suite: a standard gloss white seat with the code UF1002, a standard gloss black seat with the code UF1002GB, and a slim seat with the code UF5018. The guide lists the pan bolts, the cistern bolts, the inlet valve and the outlet valve beside them, which shows the seat is sold as a part of the suite. The Universal UF seat on this page is a different item from those, a white D shape seat that the listing says suits the Fienza Delta and Koko suites. A seat is identified by a code, and the supplier can match a code to a pan faster than it can match a photograph.

Slim and standard seats change the height

Fienza's sheets show that the seat shape changes the height of the toilet. The Tono sheet gives a pan height of 455mm without the seat, 470mm with the slim seat and 480mm with the standard seat, and 485mm and 500mm with the lid down. The Lillian sheet gives lower figures, 420mm with the slim seat and 425mm with the standard seat. A few millimetres matter when the seat is used by someone for whom the height is a comfort or a safety question. The Design for Dignity accessible toilets guide gives a top of seat to floor height of 460mm to 480mm for an accessible toilet. If you are replacing a seat, ask whether the new seat has the same thickness as the old one, since a thicker seat raises the height and a slim seat lowers it.

How a soft close hinge works

Burdens Bathrooms describes the soft close action as a damping mechanism in the hinges that slows the descent of the seat and lid, using hydraulic dampers or viscous fluid in the hinge to absorb the energy. It says repeated slamming can chip or crack porcelain and weaken the seat over time, and gives a lifespan of generally 40,000 to 55,000 cycles, or more than five years of daily use with proper care. For care it advises mild soap and water and avoiding harsh chemicals, and if the closing speed slows, soaking the hinges in warm soapy water to remove debris. CHOICE says soft close lids close more gently, reduce noise and are less likely to damage the pan, and quick release seats can be removed for cleaning without tools.

Cleaning the seat and the hinges

The care panel on Fienza's sheets says the seat may be removed for cleaning by depressing the quick release buttons and lifting up. It says to clean only with a soft cloth or sponge using warm water and mild soap or detergent, with no abrasive cleaning materials, and no solvents or corrosive liquids. The Australian Stainless Steel Development Association advises soap or mild detergent in warm water, a rinse with clean cold water and a dry wipe for stainless steel hinges, and says cleaners containing chlorides or bleach must not be used. Wipe splashes of bowl cleaner off the hinges and the seat straight away, and lift the seat off to clean around the hinge posts.

When only the hinge covers need changing

If the seat is sound but the hinge covers are worn or marked, the covers can be replaced on their own. The Lillian guide shows the hinge covers fixing over the hinges as the last step, and the Universal UF seat's box contains a fixing kit. Check the fixing kit contents against the old hinges before you order, and keep the old screws and washers. A new seat on an old pan may need the hinge posts re-set, and the guide says to adjust the seat to fit the ceramic well and then tighten the screws.

A seat or a new suite

A new seat solves a worn or cracked seat, a loose hinge or a colour mismatch. It does not solve a pan that is cracked, stained through the glaze or the wrong height. The Tono sheet shows that a slim seat and a standard seat differ in height by 10mm, and a seat that sits wrong can look like a pan fault. If you are unsure, take the old seat off and look at the pan, the hinge holes and the hinge posts, then photograph them. If the pan is sound, a replacement seat is the simplest fix. If the pan is damaged or the suite is dated, the Fienza suites on Fienza toilets are the next step.

What a new seat does and does not change

A new seat changes how the toilet feels to sit on, how quietly the lid closes and how easily the seat comes off for cleaning. It does not change the water use, the flush or the waste position. The WELS label belongs to the suite, and a seat has no WELS rating. CHOICE says soft close lids are less likely to damage the pan, which is a reason to replace a slamming seat before it chips the ceramic. If your old seat is a plain plastic seat and you want a soft close action, the Universal UF seat is a straightforward upgrade for a Delta or Koko pan.

The Delta and Koko suites the seat is made for

The listing says the Universal UF seat suits the Fienza Delta and Koko suites, and both are Fienza back to wall designs. Retailer listings for the Delta back to wall suite describe an extra height pan, a P trap or S trap version, and top or bottom inlets, and one lists an adjustable S trap set out of 160mm to 230mm. They give WELS 4 star ratings with average flush figures that differ between model codes, such as 3.2 and 3.3 litres, and different registration numbers, which is a reminder that the code identifies the product. A Delta Care version of the suite is sold with a white, grey or blue seat and raised flush buttons, and the Burdens listing describes a raised toilet design for improved accessibility. If your suite has a Delta Care code, ask the supplier whether the Universal UF seat fits it, because the care seats are a different design.

The Koko is a tornado flush suite, and the tornado flush toilets page explains that flush.

Seat colour and contrast

The Design for Dignity accessible toilets guide, published with the Australian Network on Disability, asks for a 30 percent luminance contrast between the toilet seat and the wall or floor, and a seat load certification of 150kg. It says nothing about the colour of the seat against the pan, and the guide is about accessible toilets. A white seat on a white pan on a pale floor has little contrast. The Universal UF seat on this page is white, so if contrast is a concern for the person using the toilet, ask an access consultant or an occupational therapist rather than relying on the colour.

Questions to ask about Fienza toilet seats

Ask which suite codes the Universal UF seat suits, and whether it fits a Delta Care suite. Ask for the specification sheet, which should give the hinge centres and the seat dimensions. Ask whether the seat is top fix or bottom fix, and what the fixing kit contains. Ask for the height the seat adds to the pan, and whether the seat has a lid that sits flat against the cistern. Keep the sheet and the old seat's details together, and if you are changing the seat for accessibility reasons, ask the person who will use the toilet to try the height before you fix it.

Replacing the whole suite

For the whole Fienza range, see Fienza toilets. The buying guide on the main toilets page covers set out, inlet and projection if you are replacing the whole suite. The Lillian guide's warning not to open the lid past 105 degrees until the seat is fixed also applies when you test fit a replacement.