For decades Pura's standard plastic housing units have set the standard for residential and light industrial ultraviolet water treatment. Now Pura offers an alternative series of top quality stainless steel UV units with enhanced performance features like higher lamp output and electronic performance monitoring. (Don't worry. Standard Pura plastic systems aren't being discontinued. The Stainless Steel units offered on this page supplement, but will not replace, Pura's traditional plastic units.)

Easy to install, easy to set up. Above, the control module for a Pura Stainess unit.

To understand the differences between the conventional Pura units and the new stainless units, it's necessary to talk a bit about how UV dosage is measured. UV dosage is typically described in units called "Joules," and it is most frequently expressed in terms of "mega Joules per square centimeter," or mJ/cm². (Microwatts per second per square centimeter, expressed as µWs/cm2, and mJ/cm2 represent the same dosage and are used interchangeably.) The higher the number, the higher the dosage. The UV dosage increases as the flow rate of the water being treated decreases, so a UV unit that puts out a dosage of 16 mJ/cm² while treating water at a flow rate of eleven gallons per minute (gpm) will be rated as 40 mJ/cm² if the flow rate is decreased to 4.5 gpm.

NSF International believes that a UV dose of 40 mJ/cm2 is the minimum UV dose required to ensure that all bacteria, viruses, Giardia and Cryptosporidium are killed or inactivated to a safe level. However, for practical purposes, much smaller doses are usually regarded as adequate. The most common concerns, e Coli, Giardia, and Cryptosporidium, are effectively eliminated at less than seven mJ/cm².

Pura's stated gallon-per-minute ratings for its stainless models are based on a dosage rate of 30mJ/cm². In other words, the UVSS-6 has a 30mJ/cm² rating at a flow of 6 gpm. As the table below indicates, there's a significant margin of safety built in. (The conventional plastic Pura units are rated for a dosage rate of 16 mJ/cm², so comparing the two systems can be tricky. A Pura "Big Boy" series plastic unit, for example, that is rated for 16 mJ/cm² at a flow of 15 gallons per minute, has a much higher dosage rate at normal residential flow rates.)

Pura stainless units are tough, durable, easy to install, and easy to maintain. Pura stainless units are divided into regular units (designated SS) and monitored units (designated SS-M). The monitor is an intensity monitor that actually provides a reading of the current intensity of the UV lamp. Since it's a high tech instrument, it's expensive.

We pay shipping on all products on this page.

 

Part #	Description	Price
UV040	Pura UVSS-6 Stainless Steel UV Unit	$362
UV041	Pura UVSS-10 Stainless Steel UV Unit	$583
UV042	Pura UVSS-15 Stainless Steel UV Unit	$719
UV043	Pura UVSS-6M Stainless Steel UV Unit with Intensity Monitor	$658
UV044	Pura UVSS-10M Stainless Steel UV Unit with Intensity Monitor	$796
UV045	Pura UVSS-15M Stainless Steel UV Unit with Intensity Monitor	$1054

Optional Prefilters for Pura SS Units

 

One strong feature of the traditional plastic Pura ultraviolet units is that they're sold with optional

2.5" X 20" and 4.5" X 20" cartridges fit the housings above.

sediment and/or carbon filtration built into a single product. This is a popular residential format because the user gets a complete water treatment system in a single treatment unit.

Pura's stainless units are sold as UV only, so we've added some filters from our regular stock to supplement them. The cartridge filters listed later on this page are identical to the filter housings on the original plastic Pura filtration systems. The purchaser can, of course, use the stainless unit with an existing filter or add his own filtration from another source to the stainless Pura system. With UV, unless the water is very clean, it's necessary to pre-treat with at least a five micron sediment filter to insure adequate UV treatment.

Sizing suggestion: Use either size with UVSS-6 and UVSS-6M units, but use larger size only (4.5" X 20") with higher flow sizes.

 

 

 

 

 

 

 

Part #	Description	Price
UV700	Add-On Sediment Prefilter with 2.5" X 20" 5 Micron Wound String Cartridge. Includes Pentek Filter Housing (3/4" Ports), Mounting Bracket, Wrench & a 5 micron Sediment Cartridge.	$89
UV701	Add-On Carbon Block Prefilter with 2.5" X 20" CTO Carbon Block Cartridge. Includes Pentek Filter Housing (3/4" Ports), Mounting Bracket, Wrench & a CTO Carbon Block Cartridge.	$99
UV702	Add-on Double Filter with one 5 Micron Sediment and one CTO Carbon Block, 2.5 X 20" Cartridges. Includes Pentek Filter Housing with (3/4" Ports), Mounting Bracket, Wrench, One 5 Micron Sediment Cartridge & a CTO Carbon Block.	$168
UV703	Add-On Sediment Prefilter with 4.5" X 20" 5 Micron Wound String Cartridge. Includes Pentek Filter Housing (1" Ports), Mounting Bracket, Wrench & a 5 Micron Wound String Sediment Cartridge.	$148
UV704	Add-On Carbon Block Prefilter with 4.5" X 20" CTO Carbon Block Cartridge. Includes Pentek Filter Housing (1" Ports), Mounting Bracket, Wrench & a CTO Carbon Block Cartridge.	$168
UV705	Add-on Double Filter with one 5 Micron Sediment and one CTO Carbon Block, 4.5 X 20" Cartridges. Includes Pentek Filter Housing (1" Ports), Mounting Bracket, Wrench, a 5 Micron Sediment Cartridge & a CTO Carbon Block.	$281

Parts for Pura SS Units

 

Part #	Description	Price
UV107	Lamp For Pura UVSS-6 and UV SS-6M Units	$85
UV108	Lamp For Pura UVSS-10 and UV SS-10M Units	$112
UV109	Lamp For Pura UVSS-15 and UV SS-15M Units	$117
UV110	Quartz Sleeve for Pura UVSS-6 and UV-6M Units	$56
UV111	Quartz Sleeve for Pura UVSS-10 and UV-10M Units	$72
UV112	Quartz Sleeve for Pura UVSS-15 and UV-15M Units	$76
UV220	Power Module, Control Box for UVSS-6, UVSS-10, and UVSS-15 Units	$187
UV221	Power Module, Control Box for UVSS-6M, UVSS-10M, and UVSS-15M Units	$321
UV222	3/4" Solenoid Valve Kit for UVSS-6M and UVSS-10M Units	$233
UV223	1 Solenoid Valve Kit for UVSS-15M Unit.	$378

We pay shipping on all products on this page.

Pure Water Products