MP Smith Syphon C Link L+S SU9974

SKU DEC-063727

EAN: 5019923199741

£2.18

inc VAT£1.82 ex VAT

Lead time: 2-10 working days

Price BeaterSeen this item cheaper elsewhere? Let us know.

Questions about this part? Talk to our team

Phone: 01226 369637

Opening times

Monday to Friday 08:00 to 17:00
Saturday and Sunday: closed

Delivery

Free standard delivery on orders over £100 ex VAT. Orders below this carry a £7.95 inc VAT delivery charge. Express delivery items £19.95 inc VAT, allow 1 to 2 working days. Delivery details and surcharges

Need delivery on or before a specific day? Ask our team.

Description

Product Overview

The MP Smith Syphon C Link L+S SU9974 is a replacement C link set for compatible toilet cistern syphon mechanisms. Designed for restoring reliable flushing performance, it helps you complete a quick, cost-effective repair without replacing the entire flush unit. Ideal for maintenance jobs where worn or broken linkage is causing poor flush action.

Key Features

Long and short link set (L+S) – helps match common cistern configurations for a more accurate replacement.
Genuine MP Smith spare – designed for dependable fit and consistent flush operation on compatible syphon assemblies.
Restores flush control – replaces damaged or worn linkage to improve flush reliability and reduce repeat call-backs.
Quick repair solution – swap the link rather than the full syphon to save time and minimise disruption.

Use Case / Application

Suitable for toilet cistern repairs in domestic and light commercial settings. Commonly used in bathrooms, en-suites and cloakrooms where the syphon linkage needs replacing due to wear, snapping, or inconsistent flushing. Ideal for plumbers, maintenance teams and DIY repairs when servicing compatible MP Smith Syphon C systems.

Problem to Solution

Ideal for fixing a toilet that will not flush properly due to a worn, loose or broken syphon link, restoring smooth and reliable flush operation.

Product Specifications

Manufacturer – MP Smith
Manufacturer Part Number (MPN) – SU9974
EAN / Barcode – 5019923199741
Product Type – Toilet cistern syphon link set (C link, L+S)
Typical Applications / Use Cases – Replacement flush syphon link for compatible toilet cistern syphon mechanisms in bathrooms and washrooms

Why Buy from BHL

MP Smith is known for practical, dependable toilet and cistern spares designed to keep bathrooms working reliably. Order the MP Smith Syphon C Link L+S SU9974 from BHL for competitive pricing and genuine parts delivered with care from UK warehouses. As a specialist online merchant trusted by thousands of satisfied customers since 1998, BHL has earned thousands of 5 star reviews for service and reliability. Buy online today for free* and fast UK delivery and get your repair sorted quickly. *see our terms

Reviews

Buying guide: Toilet Spares & Parts

Toilet spares keep a WC cistern filling, flushing and shutting off as it should. This category covers fill valves (also called float valves or ball valves), flush valves and siphons, push buttons and levers, flush pipes, cistern service packs, tap connectors with isolating valves, and support frames for wall-hung pans, basins and bidets.

Fill valves

The fill valve lets water into the cistern and closes when it reaches the set level. Start by checking where the supply enters: bottom entry valves rise from the base of the cistern, while side entry valves fit through the side wall. Then match the shank size, usually 1/2 inch with 3/8 inch on some cisterns, and choose a plastic or brass shank. Many bottom entry valves adjust in height to suit different cisterns. A servicing valve on the supply pipe next to the cistern lets you isolate it for repairs.

Flush valves, siphons and buttons

Flush valves: lift to release water and are worked by a lever, a cable from a push button, or air from a pneumatic button, which is common on concealed cisterns.
Siphons: the traditional alternative, worked by a lever or a push button.
Buttons and levers: match the operating type and the size of the hole in the lid or cistern front.

In England and Wales, under the Water Supply (Water Fittings) Regulations 1999, a WC flush must not exceed 6 litres, the smaller flush on a dual flush must be no more than two-thirds of the full flush, and the cistern needs a warning pipe or an equally effective overflow arrangement.

Finding the right part

Note any make or model marked inside the cistern, measure the old part and compare it before buying. For complete units, see toilets; for isolating and servicing valves, see valves.

Shop all Toilet Spares & Parts