UV Coils for Water Purification
various shapes and sizes of natural PTFE tubing

Markel FEP (Fluorinated Ethylene Propylene) coiled tubing is made with 100% certified PFOA free resin and  has long been used in UV water purification systems.

FEP is translucent and is resistant to premature degradation at the critical 254nm UV wavelength, thus making it ideal for transporting water during the purification cycle.

Through its unique manufacturing process, Markel is able to provide coils that deliver the highest volume of water close to the UV bulb.

Custom Coil Sizes Available

Tubing ID: Max 0.75” (19.05), Coil ID: Max 10” (254), Length: Max 8’

Standard Sizes (in/mm)

Tubing ID Tubing OD Coil ID
.280/7.1 .304/7.7 1.24/31.5
.325/8.3 .375/9.5 .875/22.2
.370/9.4 .394/10 .875/22.2
.437/11.1 .500/12.7 1.75/44.5
.500/12.7 .550/14 1.75/44.5
.500/12.7 .550/14 .875/22.2
.500/12.7 .550/14 1.0/25.4
.500/12.7 .560/14.2 2.5/63.5

See data sheet below for detailed specifications

FEP Coils Data Sheet

Design Options

Markel offers a unique processing capability to provide coils in just the exact size to meet the requirements of any custom appliance design. Heavy wall pressure coils and minimum wall gravity feed coils can be made to fit into the most compact designs. The largest tube diameter to coil diameter ratios in the industry have been developed in the mass production of coils at Markel. This allows the greatest water flow close to the bulb for maximum UV radiation transmittance.

Cut lengths or bulk lengths of coiled tubing can be provided as needed.

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