These housings are available in a wide selection of materials including Keystone’s EXCLUSIVE CLEAR styrene models. Standard filter housings offer the following:

• Available with Keystone’s EXCLUSIVE 10" and 20" clear styrene acrylonitrile (SAN) bowl or our 10" and 20" blue talc reinforced polypropylene bowl.
  
• Features 3/4" NPT connections. (Also available with British pipe threads.)
  
• Head and sump threads incorporate Keystone’s EXCLUSIVE positive stop feature to prevent overtightening.
  
• O-ring is securely retained in groove at top of bowl so that it stays in place even during cartridge replacement.
  
• 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: 2-1/2" O.D. x 1" I.D. x 9-3/4" (full length), and 20" (double length).
  
• Full testing to industry standards of the Water Quality Association for burst pressure, water tightness and fatigue resistance.
  
• FDA grade material for potable water

Keystone standard reinforced nylon cartridge housings are suitable for hot water/high pressure service. These units offer a lightweight alternative to costly metallic vessels.

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
• NPT connections are standard