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Siamp Standard 99B Bottom Entry 1/2" Plastic Compact Inlet Valve 30996007

Item Code: SP026371

Siamp Compact 99B inlet valve is a reliable toilet float valve replacement for most ceramic or plastic bottom entry cisterns 30996007. Sold in many Twyfords, Vitra, Lecico sanitaryware and B&Q bathroom packs.

Availability: In stock

Regular Price: £13.99

Now only £11.99 INC VAT

Product Description

Why Buy?

  • WRAS Approved
  • BS1212 Part 4
  • 10" (254mm) height
  • Fits most cisterns
  • Anti-siphon design prevents contamination of fresh water supply
  • 1/2" Plastic Tail
  • Compact - float supplied
  • Easy to install
  • 10 Year Guarantee


The Siamp Standard 99B Bottom Entry 1/2" Plastic Compact Inlet Valve 30996007 is an ideal replacement for most plastic or ceramic cisterns.

WRAS Approved
WRAS stands for Water Regulations Advisory Scheme, a certification mark that demonstrates that an item complies with the high standards set out by water regulations.

BS1212 Part 4
BS1212 is a British Standard of manufacturing, so you can be assured that the product will be of high quality specification, design and build. Part 4 valves are equilibrium valves - they manage the pressure of the water within the valve to give assisted shut off and hydraulically open the inlet, for a fast, smooth and quiet operation of the water returning into the cistern after flushing.

Fixed Height
The fill valve has an 10 inch height. This is to allow the installer accuracy when setting the water level inside the cistern, so you can decide how much water you want to allow back into the cistern before the valve shuts off, giving you the freedom to make your toilet as water saving as you'd like.

1/2" Plastic Tail
Supplied with a threaded 1/2" plastic tail, this will fit most plastic or ceramic UK cisterns with a 1/2" inlet, making installation as easy as possible.

Designed with an unobtrusive float mechanism, this inlet valve can be fitted inside even the smallest of toilet cisterns, perfect for any en-suite or WC.

Easy to Install
Supplied with comprehensive fitting instructions, this product could not be easier to install. Once the water flow to the toilet has been shut off and the cistern has been drained of all water. Remove the old valve, unscrew the nut from the inlet thread, place inside cistern (inlet hole), seal and re-attach the nut onto the inlet thread. Once the water level has been set to the desired height, turn the water back on for testing.

10 Year Guarantee
Giving you that extra peace of mind, if the product breaks or doesn’t work then please let us know and we will be happy to refund or replace the item within 10 years of purchase.

Additional Information
Additional Information
SKU SP026371
Compatible with No
Manufacturer Siamp
Lever Type N/A
Customer Reviews (31)
Good Product
Thanks very much Spares Pro, we were self isolating with Covid when our cistern stopped working. Because of your clear photos and mail order service we got our pump delivered. Have managed to fit it today, hardest part was unscrewing the old part. It works beautifully, so quiet and fast, we're happy we took the small gamble ordering from you as we're amateurs and would usually have just paid a plumber to do it for us. Thanks again. Review by Mike (Posted on 30/01/2021)
Fast turn round on both despatch & delivery, Good range of stock, with an easy to use website to navigate around. Will certainly be using this company again. Review by I. W. Plumbing Services (Posted on 25/01/2021)
Easy to order , arrived quickly, good quality product , problem solved, thank you Review by Dee (Posted on 19/01/2021)
Good product, Quick service
Found the part I needed on SparesPro at a great price. Good website, ordered easily and it was delivered promptly. Just what I needed and easily fitted. Review by Mike (Posted on 18/01/2021)
Arrived next day, easy to fit and works a treat now. Review by Jampot (Posted on 30/12/2020)
Good price, speedy delivery. Used the valve portion to replace valve on an existing fitting and it was perfectly interchangeable. Works fine. Review by Donk (Posted on 19/11/2020)
Inlet valve.
Just “what the doctor ordered”. Replaced the faulty inlet valve with like for like new one.
Delivery took a bit longer than expected.
The client were not phased about the late delivery.
5/5 ⭐️
Review by Micky (Posted on 15/09/2020)
easy fit
arrived quickly. easy to remove old one and fit new one. was done in about 5 mins. very pleased with the item. Review by sparker86 (Posted on 29/06/2020)
A good product and service
Searched for the product having identified the faulty part, found it on sparepro at a good price in stock. Product arrived promptly with easy to follow instructions a o despite being a complete novice I had it fitted and working in less than an hour. Review by Rick (Posted on 19/05/2020)
Quick delivery
I ordered the Valve Quick delivery, fitted, job done. Review by Billyboy (Posted on 09/05/2020)
Perfect Match
Prompt service Review by Tim (Posted on 07/05/2020)
Bought this as a replacement for my mums loo. Not fitted yet due to current lockdown (she’s 93), hopefully it will work ok. Review by Wag53 (Posted on 30/04/2020)
Bottom fill valve
Great value for money and great service. Very easy to install and works grest Review by Hemy (Posted on 28/04/2020)
Most popular fitting type
If you are fitting a replacement bottom entry valve, with centre flush button cistern this is the most common fitted originally. It is very standard, easy to fit and relatively cheap.
In stock, good delivery and easy to fit with just an adjustable spanner.
Cut you water supply off, sponge up the water in the bottom of the cistern, unscrew from underneath, take out and refit new part. Make sure you get the white seal dome shape into the cistern, do not overtighten, turn on water, adjust ball cock for finish depth if necessary, usually fine as standard.
Review by David (Posted on 28/04/2020)
Competitively priced. Quick delivery. Highly recommend. Review by Sedders (Posted on 28/04/2020)
Excellent part and super fast delivery Review by Steve (Posted on 19/04/2020)
Excellent thanks
No fuss quick delivery Review by Gus (Posted on 16/04/2020)
All good
Prompt service and the part was fine, easy to fit and I got brownie points from my wife! Review by jr (Posted on 18/02/2020)
Very satisfied.
I found the parts on your website. I had difficulty finding this part elsewhere. My husband could fix the toilet himself, so avoiding huge costs using a plumber. Would recommend your company Review by jennifer (Posted on 27/01/2020)
Just the job.
Efficient delivery, great price. Toilet fixed, thank you. Review by Carol (Posted on 15/10/2019)

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