Description
The Fluidmaster PRO45B is the professional plumber’s choice when only the best will do. Its heavy-duty brass shank won’t crack, corrode, or strip — outperforming plastic-shanked alternatives in demanding residential and commercial installations alike. A specially engineered shank design eliminates water hammer and delivers ultra-quiet operation, backed by a 5-year manufacturer’s warranty from the company that invented the fill valve in 1958.
Key Features
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Heavy-duty brass shank — won’t crack, corrode, or strip; outlasts plastic alternatives
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Ultra-quiet operation — engineered shank design eliminates water hammer and noise
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Universal fit — compatible with all major toilet brands with 1/2" bottom-entry connections
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Tool-free water level adjustment — twist the adjustment rod to set float height
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Code approved — complies with Water Supply (Water Fittings) Regulations
- 5-year manufacturer’s warranty
Technical Specification
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Brand: Fluidmaster
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Model: PRO45B
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SKU: K07084
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Connection type: Bottom entry
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Connection size: 1/2" BSP
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Shank material: Brass
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Max water pressure: 150 psi (10.3 bar)
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Warranty: 5 years
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Compliance: Code approved; meets UK Water Supply (Water Fittings) Regulations
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Country of Origin: Spain
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Barcode: 039961455420
Delivery Information
This is a small, postable item covered by a one-off small item delivery charge. You can combine it with other small items in a single order and pay just one delivery charge. Browse all items covered by the small delivery charge.
Other Fluidmaster Products
Frequently Asked Questions
What’s the difference between the PRO45B and PRO400UK?
Both are 1/2" bottom entry fill valves. The PRO45B’s key advantage is its heavy-duty brass shank, which offers superior durability and corrosion resistance compared to the plastic shank on the PRO400UK. The PRO45B is the preferred choice for demanding or commercial installations where longevity is paramount.
Why is brass better than plastic for the shank?
Brass won’t crack under stress, resists corrosion from minerals in the water, and maintains thread integrity through repeated installations. It provides a more rigid, reliable seal and simply outlasts plastic in demanding applications.
Is this compatible with my toilet?
The PRO45B fits virtually all toilet brands with a 1/2" bottom-entry connection, including Ideal Standard, Armitage Shanks, Roca, Twyford, Duravit, Villeroy & Boch, and many others. Confirm your cistern has a bottom-entry supply before ordering.
How quickly will my order be dispatched?
If the item shows as in stock, it will be dispatched within 48 hours. If the item is showing as 0 stock, it is ordered in specially for you and will typically be dispatched within 4 working days.
Can I order if the item shows as out of stock?
Yes — you can still place an order and we’ll source it for you. Contact us at customerservice@bubblegumbathrooms.co.uk or call 01603 381095 if you need a lead time estimate.
Is delivery free?
This is a small postable item with a one-off small item delivery charge. You can combine multiple small items in one order and pay a single charge.
