Features
Product Description
Reverse osmosis systems used with an auto shut off valve require a check valve to prevent back flow. This allows pressure to build up so the auto shut off can activate and shut the system off. Systems that continually run water down the drain may be missing or have a bad check valve, and systems that intermittently turn on without any water use may indicate a worn check valve.
Product Highlights
- The 1/4" quick connect fitting fits standard 1/4" tubing used on most RO systems.
- Compatible with most Reverse Osmosis systems (including brand names) in the market
- To be installed on the outlet port of membrane housing.
- AvailabilityIn Stock
- Model ACV1K
- Manufacturer iSpring
- Product Weight 0.2 LB
iSpring vs Other Brands
Feature



NSF/ANSI 58 Certification
Yes (full system certified)
Often partial or none
Verified performance & safety
Filtration Stages
Clear 3/4/5/7 stage options
Usually 4-5 stages
More complete options
Alkaline Remineralization
Available (RCC7AK/RCC7AK-UV)
Rare or expensive add-on
Better taste & pH balance
See-through 1st Stage Housing
Yes, smart flow sensor
Unavailable in most systems
Easy visual inspection
Daily Production
75 GPD (reliable output)
Often lower or overstated
Reliable daily production
Replacement Filters
Widely available & affordable
Hard or harder to find
Lower long-term cost
Installation
DIY friendly, no plumber needed
Can be more complex
Faster & easier set-up
Support & Warranty
Responsive support + solid warranty
Varies widely
Better post-purchase experience
Value for Money
High performance at competitive price
Higher price for similar specs
Better cost-effectiveness

