The iSpring ACL1 RO Add-on Filter Kit is a compact retrofit kit that provides an extra inline filtration stage for standard reverse osmosis systems using 1/4" quick connect tubing. Designed for easy DIY installation, the kit supplies push-to-connect fittings, clamps and tubing so you can add a carbon or specialty polishing filter to improve taste, reduce contaminants and help extend membrane life without cutting pipes.
Extra filtration stage: install an additional carbon or specialty filter between existing RO stages to improve water taste and remove more contaminants.
Complete DIY retrofit: includes the fittings, clamps and tubing required for inline installation so no special adapters are needed.
1/4" quick connect fittings: push-to-connect design for fast, leak-resistant assembly and secure grip.
Compact under-sink fit: small footprint fits into tight spaces commonly found beneath kitchen sinks.
Universal compatibility with named models: essential upgrade kit for iSpring RCC7 and RC7AK RO systems.
Annual maintenance friendly: ideal for adding inline carbon polishing or specialty filters as part of routine service.