Description
This is a small repair kit intended to restore the internal working parts of a Tower-brand diverter valve used in domestic boilers and combination boiler/heating systems. It doesn’t replace the whole valve body or actuator; instead it supplies the internal components that commonly fail — the parts that stop the diverter sealing correctly and moving water between the central‑heating circuit and the domestic hot‑water circuit.
The practical value of a repair kit like this is straightforward: if a boiler has stopped switching correctly between heating and hot water, or you have a leak at the diverter valve nut, replacing worn internal seals and spindle parts is often enough to cure the fault without swapping the complete valve. For engineers and spares stores the DVRK1 is therefore a useful, lightweight item to carry because it can avoid longer repairs and the need for a full valve exchange.
Key specifications
- Product code: DVRK1
- Brand / trade range: Tower (TFC Group)
- Compatibility: all Tower diverter valves; cited compatibility with a number of CB and CD series boiler models
- Compatible boiler models (listed by supplier): CB24, CB24X, CB28, CB28X, CD18S, CD24C, CD24S, CD30S, CD32C, SY24
- Weight (packed): 40 g
- Category: Central Heating Products — diverter valve repair kit
What it does, and what to expect
The DVRK1 is intended to replace worn internal components of a diverter valve so the valve moves freely and seals correctly. Typical symptoms that point to this sort of kit being required are: a constant slow leak from the diverter valve nut, inability to get hot water or heating on demand (the valve sticks), or intermittent changeover between heating and hot water. Replacing the internal seals, O‑rings and spindle/sleeve (the usual contents of a diverter service kit) will often restore normal operation where the valve body and actuator are otherwise sound.
Because the kit fixes internal wear, it saves time and cost compared with removing and replacing the entire valve assembly — when it’s the correct remedy. It’s a routine item for plumbing and heating engineers attending common domestic boiler faults and for maintenance stock in trade vans.
Compatibility and limits
The supplier material for this specific kit describes it as a universal fit for Tower diverter valves and lists a set of boiler types where it is commonly used (CB and CD series examples are shown above). Distributor catalogue material that lists the Tower trade range also shows the DVRK1 as the relevant repair kit product code, and indicates the Tower range is supplied by TFC Group.
Two practical cautions about compatibility: first, “universal for Tower diverter valves” means it’s designed to fit the family of diverter valves sold under the Tower trade name, not that it will automatically fit every diverter valve from every manufacturer. Second, although some distributor documents list the DVRK1 as suitable for a number of CB and CD boiler models, you should always verify the boiler or valve part‑number before ordering. If a valve is corroded, mechanically damaged or its actuator/motor is the fault, the kit will not be a cure and a full valve replacement will be required.
Installation and installer notes
The DVRK1 is a service part intended to be fitted by a competent heating engineer. It is a small kit (the listed packed weight is about 40 g) and contains internal components — typically seals, O‑rings and replacement small parts — so careful identification of the valve model and correct isolation/draining of the appliance are essential before any work starts.
Do not attempt to fit the kit unless you are confident of isolating the boiler and system and have the correct tools and spares. If there is any doubt about the root cause (for example, electrical or actuator failure, or extensive corrosion), fitting the kit may not restore reliable operation and could delay a proper repair. Also bear in mind that some boiler manufacturers require that servicing or repairs affecting the diverter valve are carried out or approved by an authorised engineer to preserve warranty or service arrangements.
Practical buying and spares management
For engineers the DVRK1 is a useful fill‑in spares item: small, light and applicable across the Tower range so one kit can cover multiple boiler platforms. For householders, the key point is that a kit like this can avoid the expense and disruption of a full valve change — but only if the fault is genuinely internal wear.
Before you buy, confirm the exact valve/boiler model and check whether the supplier lists the kit’s detailed contents or provides an installation sheet. If detailed contents and fitting instructions are required for compliance or warranty reasons, request those from the supplier or the installing engineer.
