What is a urinal inlet or spreader?
Every urinal bowl has an inlet where flush water enters from the cistern. The urinal spreader is the fitting that sits in this inlet and connects it to the flush pipe. Its job is to take the stream of water arriving from the pipe and spread it across the inside of the bowl, so the whole surface is rinsed rather than just a narrow strip. A spreader that works properly keeps the bowl clean between manual cleans, washes away urine before it can dry and form scale, and helps control odours in the washroom. A worn, cracked or blocked spreader is one of the most common reasons a urinal flushes unevenly, leaves dry patches or starts to smell.
Back inlet or top inlet: which do you need?
Back inlet urinal spreaders
A back inlet spreader fits urinal bowls where the water enters through the back of the bowl. The flush pipe is usually hidden behind the wall or a duct panel, so only the bowl is visible. This gives a cleaner, more modern washroom and makes the pipework harder to damage or tamper with, which is why back inlet urinals are common in schools, sports clubs and public washrooms.
Top inlet urinal spreaders
A top inlet spreader fits bowls where the water enters through the top. The flush pipe runs down the surface of the wall to the bowl, which makes installation and maintenance simpler, especially in older buildings or where pipework is already exposed. Top inlet designs are a practical choice when replacing urinals without opening up the wall.
The inlet type must match your urinal bowl. Check the bowl's specification or look at where the existing flush pipe enters before you order. Our back inlet and top inlet spreaders are designed to suit each type.
How does the urinal flush system work?
A typical commercial urinal system has three parts working together. An automatic urinal cistern mounted above the bowls fills slowly and releases water at regular intervals. Sparge pipes carry the water from the cistern down to each bowl, and the spreader at the inlet distributes it around the bowl. If any one of these parts is worn or the wrong type, the flush will not reach the whole bowl. When you replace a spreader, it is worth checking the sparge pipe connections and the cistern at the same time, especially in older installations.
When should you replace a urinal spreader?
Replace the spreader if water splashes out of the bowl, runs down only one side, or leaves part of the surface dry after flushing. Other signs are visible cracks, leaks at the joint with the flush pipe, and limescale or urine scale building up around the inlet, which can narrow or block the openings. In hard water areas, regular descaling helps the spreader last longer, but a heavily scaled fitting is often quicker and cheaper to replace than to clear. Spreaders are a low-cost part, so replacing them during routine washroom maintenance keeps every bowl flushing evenly.
To fit a replacement, isolate the water supply to the cistern, disconnect the sparge pipe from the old spreader and remove it from the bowl inlet. Clean the inlet, fit the new spreader with its seal, reconnect the sparge pipe and restore the supply, then run a flush to check for leaks and even coverage. Tile Merchant supplies bathroom products only and does not provide fitting, so we recommend using a qualified plumber.
Frequently asked questions
What does a urinal spreader do?
It connects the flush pipe to the urinal bowl and spreads the flush water evenly across the inside, so the whole bowl is rinsed clean.
How do I know if I need a back inlet or top inlet spreader?
Check where the flush pipe enters your urinal bowl. If it enters through the back, choose a back inlet spreader. If it enters through the top, choose a top inlet spreader.
Why is my urinal not flushing evenly?
The most common causes are a worn or scaled spreader, a blocked sparge pipe or a cistern that is not releasing enough water.
Can I replace a urinal spreader myself?
It is a fairly simple job, but it involves isolating the water supply and reconnecting the flush pipe, so we recommend using a qualified plumber.
Do you deliver urinal inlets across Ireland?
Yes. We deliver nationwide, and each product page shows the expected delivery time and whether the item is available for collection.