GCTek Zapp Pure UV Sterilizer for Koi Ponds
The Zapp Pure UV Sterilizer from GC Tek is a single lamp, high intensity UV built from high quality brushed stainless steel. Each unit runs one high intensity lamp with an output of 70,000 microwatts plus, powered by a higher grade electronic ballast for long life. A clear viewing connection shows at a glance whether the lamp is on, and union connections make it easy to plumb in and take out for service.
• Three Sizes: ZP-5, ZP-10 and ZP-20 for ponds up to 6,600, 12,000 and 18,000 gallons.
• Flow Rates up to 6,048 GPH: 2,200 GPH on the ZP-5, 4,000 GPH on the ZP-10 and 6,048 GPH on the ZP-20.
• Single Lamp Design: One lamp per unit keeps maintenance simple and economical.
• Clear Viewing Connection: See that the lamp is working without opening the unit.
• Union Connections: Every model comes with union connections for easy installs and service.
• Brushed Stainless Steel: An easy care finish that holds up outdoors.
Which Zapp Pure UV Sterilizer By GCTek Do I Need?
Zapp Pure ZP-5
For ponds up to 6,600 gallons at 2,200 GPH. The compact model at 21″ tall.
Zapp Pure ZP-10
For ponds up to 12,000 gallons at 4,000 GPH. Stands 32″ tall.
Zapp Pure ZP-20
For ponds up to 18,000 gallons at 6,048 GPH. The largest Zapp Pure at 43″ tall.
Zapp Sterilizer Sizing
| Model | Max Pond Size | Max Flow | Height | Lamp |
| ZP-5 | 6,600 gal | 2,200 GPH | 21″ | Single ZP-5 lamp |
| ZP-10 | 12,000 gal | 4,000 GPH | 32″ | Single ZP-10 lamp |
| ZP-20 | 18,000 gal | 6,048 GPH | 43″ | Single ZP-20 lamp |
Replacement lamps, quartz sleeves, ballasts and gaskets are available for every Zapp Pure size.
What Comes With Every GCTek Zapp Pure Sterilizer
- Brushed stainless steel UV vessel
- Single high intensity UV lamp (70,000 microwatts plus)
- Higher grade electronic ballast
- Union connections on the inlet and outlet
- Clear viewing connection to show the lamp is on or off
Before You Order a Zapp Pure UV Sterilizer
- Size by pond volume and pump flow. The gallons and GPH for each model are maximums, so size up if your pond is near the limit.
- Keep your pump flow at or below the rated GPH of the model you choose.
- The 3″ ZP-40.3 and the dual lamp ZP6600 and ZP8800 are discontinued. For ponds over 18,000 gallons, look at the GCTek NishikigoiUV amalgam UV line in horizontal or vertical models.
- Not sure which size fits? Contact us with your pond size and pump flow and we will help you choose.
- FREE Shipping via FEDEX, LTL Ground, & UPS. Ships in 2-3 Business Days.
- Ships Only to Lower 48 States of the United States
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