---
product_id: 48677966
title: "SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve 1/2 inch Plastic 30996507 [C] by SIAMP"
brand: "siamp"
price: "€ 6.56"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.fi/products/48677966-siamp-compact-99b-wc-toilet-cistern-bottom-entry-inlet-valve
store_origin: FI
region: Finland
---

# 31.8 x 14.61 x 5.79 cm 1/2 inch inlet valve 199.58 g SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve 1/2 inch Plastic 30996507 [C] by SIAMP

**Brand:** siamp
**Price:** € 6.56
**Availability:** ❌ Out of Stock

## Summary

> 🚽 Flush Away the Old, Embrace the New!

## Quick Answers

- **What is this?** SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve 1/2 inch Plastic 30996507 [C] by SIAMP by siamp
- **How much does it cost?** € 6.56 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/48677966-siamp-compact-99b-wc-toilet-cistern-bottom-entry-inlet-valve)

## Best For

- siamp enthusiasts

## Why This Product

- Trusted siamp brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect Fit:** Designed for bottom entry, making it a seamless replacement.
- • **Lightweight Design:** Weighing in at just 200 g, it's easy to handle and install.
- • **Manufacturer Trust:** From SIAMP, a name synonymous with quality and innovation.
- • **Upgrade Your Bathroom:** Revitalize your space with the SIAMP Compact 99B!
- • **Durable Plastic Construction:** Built to last, ensuring long-term reliability.

## Overview

The SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve is a modern replacement for the discontinued model 30996507. Crafted from durable plastic, this lightweight valve measures 31.8 x 14.61 x 5.79 cm and weighs just 200 g, making it an ideal choice for easy installation and long-lasting performance.

## Description

Item is no longer made and replace by 30996007 , which will be shipped as replacement

## Features

- Alternative to the old now discontinued product 30996507

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | SIAMP |
| Part Number | 30996507 |
| Product Dimensions | 31.8 x 14.61 x 5.79 cm; 199.58 g |
| Manufacturer reference | 30996507 |
| Material | Plastic |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 200 g |

## Images

![SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve 1/2 inch Plastic 30996507 [C] by SIAMP - Image 1](https://m.media-amazon.com/images/I/51SFoG151+L.jpg)
![SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve 1/2 inch Plastic 30996507 [C] by SIAMP - Image 2](https://m.media-amazon.com/images/I/61TmrnLfVnL.jpg)
![SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve 1/2 inch Plastic 30996507 [C] by SIAMP - Image 3](https://m.media-amazon.com/images/I/61M+2kuUsOL.jpg)
![SIAMP Compact 99B WC Toilet Cistern Bottom Entry Inlet Valve 1/2 inch Plastic 30996507 [C] by SIAMP - Image 4](https://m.media-amazon.com/images/I/61ZH3JgcfcL.jpg)

## Questions & Answers

**Q: flow rate is .22l/s but this takes forever to fill my cistern is the rate adjustable ?**
A: Hi Don - I have one of these but not fitted - looked at it and seems no problems - so long as inlet pressure OK - my toilets are mains fed via a water softener, so no scale problems, and function well - fast quiet fill on a similar design - there is no pressure limiter on this one either, and the float moves easily. What to suggest? Maybe your pressure has been down temporarily, or is the adjustment for the volume the grey screw on the side caught somewhere?? I haven't found the difficulty of Heaton with the diaphragm - or maybe there is a fault and you could liaise with the supplier if nothing else comes to light - generally very helpful. Sorry, nothing obvious - Good Luck - Ross.

**Q: Will this filler fit a twyford toilet cistern?**
A: Mine is a Twyford but I don't know what model

**Q: is the ball valve height adjustable**
A: Strictly not a ball but float. Grey screw adjusts water height level.

**Q: Is the measure 5.8 cm means thread lenght?**
A: No, the thread length is 4.2cm.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent replacement.
*by L***E on 3 November 2017*

Well, here is an excellent product - compact, well made, easily fitter [and replaced a manufacturer supplied hopelessly over complex mechanism with no form of adjustment or maintenance. It is ... quiet and efficient in operation, cistern filling is rapid, and overall I have no problems with it, and no hesitation in recommending the supplier [and their delivery performance] or the product: excellent, good value for money, and ought to give very good service.

### ⭐⭐⭐⭐⭐ So good, so easy
*by S***L on 10 August 2016*

Bought this to replace a very old, noisy ballcock valve. It was very easy to install, probably about 10 minutes start to finish. Including about 10 seconds to adjust! Its compact size works well in my less than spacious 9 litre cistern.It fills the cistern quickly and quietly and shuts the water off very effectively. There is no 'clunk' as some others have mentioned.I don't know how it works but it does. And it works very well.EDIT - 15/8/16Noticed some small drips coming from the internal cistern washer that shipped with the Siamp. It seems that the washer is a bit small for my old cistern. Luckily, I retained the rubber washer from my original inlet valve and replaced the new one and it works fine. Not a drop of leakage. And I'm still delighted with the item.

### ⭐⭐⭐⭐ Easy to fit.
*by O***B on 15 April 2021*

Good price, easy to fit and delivered on time.

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**Shop now:** [https://www.desertcart.fi/products/48677966-siamp-compact-99b-wc-toilet-cistern-bottom-entry-inlet-valve](https://www.desertcart.fi/products/48677966-siamp-compact-99b-wc-toilet-cistern-bottom-entry-inlet-valve)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-28*