Sunsun Canister Filter UV Case – Quartz Glass Spare 303b & 304b

SunSun Quartz Glass UV Sleeve – Spare for 303B / 304B Canister Filters

Keep your UV sterilizer working at peak performance with this precision-crafted quartz glass sleeve, specially designed for SunSun 303B and 304B canister filters. Acting as a protective barrier between the UV bulb and the water, this durable tube ensures both effective sterilization and longer UV lamp life, while keeping your filter running safely and efficiently.

Specifications

• Material: High-grade UV-transmitting quartz glass (not ordinary glass)

• Compatibility: SunSun HW-303B & HW-304B filters (UV models only)

• Temperature Resistance: Withstands heat generated by UV bulbs

• Clarity: 99% UV transparency for maximum sterilization

• Length: Standard fit (varies slightly depending on model, but pre-fitted for these units)

Uses:

• Protects the UV Bulb from water, impact, and contamination

• Maintains UV Efficiency by allowing maximum light penetration

• Seals the UV Chamber, preventing leaks and electrical hazards

• Extends the Lifespan of your UV system by reducing wear and tear

Without this quartz sleeve, your UV lamp cannot operate safely or properly—so it’s a vital part of the filter system, not just an accessory.

When Should You Replace It?

• Cracked or chipped quartz? Replace immediately to prevent leaks.

• Cloudy sleeve? Replace to restore UV light efficiency.

• Replacing the UV bulb? It’s a good time to inspect or swap the sleeve.

Package Includes:

• 1 × Quartz UV Sleeve for 303B/304B
  (Note: UV lamp not included)

Instructions to install

1. Turn off and unplug the filter system.

2. Disassemble the UV chamber by following your filter manual.

3. Remove the damaged or old quartz tube carefully.

4. Insert the new quartz sleeve gently—do not force.

5. Ensure rubber gaskets/seals are seated properly.

6. Reassemble and test for leaks before turning the system back on.

Tips:

Always wear gloves when handling the quartz sleeve to prevent fingerprints, which can cause hotspots and reduce effectiveness over time.