OIMDK DEX2421JKIT Tension Control Clamp for Hayward Swim-Clear & Pro-Grid — Aluminum, Hand-Tighten Knob

The OIMDK 2026 upgraded DEX2421JKIT tension control clamp is a lightweight aluminum replacement clamp kit that secures the cartridge or DE filter tank top for Hayward Swim-Clear and Pro-Grid systems.

When a pool filter clamp becomes worn, cracked, or fails to keep the filter tank sealed, the OIMDK DEX2421JKIT offers a direct-fit replacement designed for several Hayward models. Built from corrosion-resistant aluminum and optimized for an easy hand-tighten knob, this clamp kit restores the seal and tension needed to keep water and air where they belong—inside the system. It replaces multiple OEM part numbers and fits both Swim-Clear cartridge filters and later-model Pro-Grid DE housings.

Which Hayward filters will this clamp kit fit?

This clamp is engineered to be compatible with a broad set of Hayward cartridge and DE filter models. It fits Swim-Clear cartridge models C2030, C3030, C4030, C5030 and C7030, and Pro-Grid DE models produced after 2007, including DE2420, DE3620, DE4820, DE6020 and DE7220.

• Direct replacement for many OEM part numbers such as 4811-100 and HAY-051-9790
• Designed for post-2007 Hayward Pro-Grid housings
• Also replaces DEX2420J and other related kit numbers

How durable and weather-resistant is the OIMDK clamp?

The clamp uses upgraded aluminum for a balance of light weight and corrosion resistance, so it stands up to poolside humidity and routine chemical exposure better than untreated steel. The material reduces the likelihood of rust and keeps the clamp functioning season after season with normal maintenance.

• Aluminum alloy construction for corrosion resistance
• Knob fastening avoids seizing common with metal-on-metal threads
• Forgiving under regular disassembly for cleaning or winterizing

How easy is it to install and operate this replacement kit?

Installation is straightforward: position the clamp around the tank seam, align the top and bottom housing sections, then hand-turn the knob until the tank is snug. No specialty tools are required for usual installs, and the knob design makes future removal and retightening simple during maintenance.

• Tool-free hand-tighten knob for quick installs
• Fits the factory groove and seals without modification
• Suitable for field replacement during routine filter servicing

What performance issues does replacing the clamp resolve?

Replacing a damaged or loose clamp reduces air ingestion and water leakage at the filter seam, which helps maintain proper hydraulic flow and filtration efficiency. A secure clamp also prevents uneven tank compression that can damage the filter lid or gasket over time.

• Helps prevent air pockets forming inside the filter tank
• Stops water seepage from the housing seam
• Protects the filter top and gasket from uneven stress

Who is this for: Pool owners, service technicians, and maintenance pros who use Hayward Swim-Clear cartridge systems or later-model Pro-Grid DE filters and need a reliable OEM-compatible clamp replacement. Choose the OIMDK DEX2421JKIT when you want an upgraded, lightweight aluminum clamp that installs without tools, restores a tight tank seal, and replaces multiple Hayward part numbers for convenient compatibility.