Standard polypro filter housings offer the following:

• White talc reinforced polypropylene head with blue talc reinforced bowl.
• Standard 3/4" NPT connections.
• Securely retained Buna “N” O-Ring to ensure effective sealing by positive tangential contact; eliminates accidental misplacement; provides longer life.
• Positive head to bowl “stop” to prevent bowl overtightening.
• Available from stock with or without pressure relief vent button.
• Custom colors available by special order.
• Mounting bosses in head for available bracket.
• Accepts industry standard cartridge size: 23/4" O.D. x 1" I.D. x 93/4" (full length), 47/8" (half size) and 20" (double length).
• Full testing to industry standards of the Water Quality Association for burst pressure, water tightness and fatigue resistance.

Standard polypro-SAN filter housings offer the following:

• White talc reinforced polypropylene head with blue talc reinforced or clear styrene acrylonitrile (SAN) bowl.
• Standard 3/4" NPT connections.
• Securely retained Buna “N” O-Ring to ensure effective sealing by positive tangential contact; eliminates accidental misplacement; provides longer life.
• Positive head to bowl “stop” to prevent bowl overtightening.
• Available from stock with or without pressure relief vent button.
• Custom colors available by special order.
• Mounting bosses in head for available bracket.
• Accepts industry standard cartridge size: 23/4" O.D. x 1" I.D. x 93/4" (full length), 47/8" (half size) and 20" (double length).
• Full testing to industry standards of the Water Quality Association for burst pressure, water tightness and fatigue resistance.

Keystone's versatile and rugged stainless steel housings are useful for a broad range of applications. Their features include:

• Rugged 304 SS construction allows for use in applications where stainless steel is preferred, including food and beverage
• High maximum temperature operation make these housings the perfect choice for high temperature applications, including hot water and hot process liquids
• Top quality and economical construction insures low total cost of ownership with years of trouble free service
• 3/4" NPT connections are standard

Keystone's versatile and rugged stainless steel housings are useful for a broad range of applications. Their features include:

• Cast bronze nickel-plated heads with nickel-plated "T" handle cap nut. Shell is a unibody style made of 304 stainless steel
• "T" handle top nut and petcock bottom drain eliminate the need for tools when changing cartridges
• Machined groove in underside of head retains Buna "N" gaskets for positive sealing

These filter housings are suitable for high temperature and high pressure service. Features include:

• Distinctive red color.
• High strength glass reinforced nylon head and bowl.
• Standard 3/4" NPT connections.
• Securely retained Buna “N” O-Ring to ensure effective sealing by positive tangential contact.; eliminates accidental misplacement; provides longer life.
• Not available with pressure relief vent button.
• Full testing to industry standards of the Water Quality Association for burst pressure, water tightness and fatigue resistance.

Standard pure polypropylene filter housings are ideal for use in all industries where filtered liquids must remain totally free of contamination. These housings are especially essential in the semi-conductor, pharmaceutical and chemical processing industries. They are constructed entirely of virgin polypropylene without color, adders, fillers, reinforcements or lubricants. In critical applications, these all natural housings insure pure, cost effective filtration of a variety of solvents, acids, alcohols and chemicals without leaching or bacterial build up. Keystone 100% polypropylene housings provide an inexpensive alternative to teflon* or fluoropolymer housings.

* Teflon® is a Registered Trademark of E. I. duPont deNemours & Co.