The V4052-01 is Clack's twin tank (TT) interconnect kit, used to plumb two resin vessels between 13" and 21" in diameter together on a duplex or alternating softener system. It provides the pipework and fittings that link the two tanks to a single control valve or alternator, allowing one vessel to remain in service while the other regenerates so the system delivers continuous soft water. It's the standard part needed when building or servicing a twin-tank Clack installation. Stocked by WrekinWater for installers and self-builders.
Technical specifications
| OEM Part Number | V4052-01 |
| Stock Code | 10440000154 |
| Type | Twin tank (TT) interconnect kit |
| Vessel Size Range | 13" to 21" diameter resin vessels |
| Function | Plumbs two resin vessels together for duplex/alternating operation |
| Brand | Clack Corporation |
Symptoms that mean you need this part
- You're building a new twin-tank Clack softener installation and need the interconnecting pipework
- An existing interconnect fitting has cracked, split or is weeping at a joint
- You're upgrading from a single tank to a duplex alternating system and need to link the vessels
- You're replacing damaged or missing interconnect components during a system rebuild
Why it fails / why it matters
A twin-tank softener relies on interconnecting pipework to route water between the alternator or control valve and each of the two resin vessels, so that one tank can regenerate while the other stays in service. Because this pipework is sized to match a range of vessel diameters, the V4052-01 kit is engineered for 13" to 21" tanks specifically, and using an incorrectly sized or damaged interconnect can cause leaks, uneven flow, or poor alternation between vessels. Whether you're assembling a new system or replacing a failed joint, fitting the correct interconnect kit is essential for reliable duplex operation.
Why buy this from WrekinWater
WrekinWater has supplied Clack components to installers building duplex and commercial softener systems for over 15 years from its Bettisfield, Shropshire base, stocking interconnect kits, valves and vessels alongside Pentair Fleck, Autotrol and Kinetico ranges. Rated Excellent on Trustpilot and having served more than 50,000 customers, the business helps installers get the right-sized kit for their vessel diameter first time.
How to fit it
- Confirm your resin vessel diameter falls within the 13"-21" range this kit is designed for before ordering or fitting
- Isolate the system at the mains and drain down the vessels before disconnecting any existing pipework
- Remove the old or damaged interconnect fittings from both vessels and the control valve/alternator
- Fit the V4052-01 kit's pipework and fittings between the vessels and valve, following the manufacturer's layout for duplex operation
- Check every joint is fully seated and tightened to the correct torque without over-tightening the plastic fittings
- Restore the water supply gradually and check all connections for leaks before returning the system to service, running a manual regeneration on each tank in turn to confirm correct alternation
Frequently Asked Questions
Unfortunately we are unable to accept returns on our Water Softener Parts So please confirm the correct part is ordered. If you have any doubt please feel free to call us prior to purchase for confirmation.
Clack V4052-01 TT interconnect kit 13-21in Vessels
