Valterra AquaFRESH exterior canister filters are available in single- and dual-housing systems. The single-housing kit uses a 5-micron carbon-block cartridge; the dual system passes water through a 10-micron sediment prefilter and then a separate finer carbon stage. Their cartridges should be selected by housing and original stage rather than appearance alone.
See the corresponding products
Choose a photo to open the matching item and verify its manufacturer's number before ordering.
A01-1139 — Valterra AquaFRESH dual-canister filter system10-micron prefilter and 0.5-micron advanced carbon stage
A01-1139 — Valterra AquaFRESH dual-canister filter system10-micron prefilter and 0.5-micron advanced carbon stage
A01-1138 — Valterra AquaFRESH single-canister exterior filterIncludes 5-micron carbon cartridge, bracket and wrench
A01-1138BU — Valterra AquaFRESH replacement single filter housingHousing with cap and fittings; cartridge sold separately
A01-1136 — Valterra 5-micron exterior carbon-block cartridgeOne 10-inch 5-micron carbon block for matching housing
A01-1137 — Valterra 10-micron exterior sediment cartridges, pairTwo 10-inch sediment-filter cartridges
How the filter stages connect
Single-housing water path
Single housingWater supply
Carbon stage5-micron carbon block (A01-1138 system)View A01-1136
OutletRV fresh-water connection
Dual-housing water path
Dual housingWater supply
Prefilter10-micron sediment stageView A01-1137
Carbon stage0.5-micron advanced carbon stage (check original cartridge)
OutletRV fresh-water connection
Filter cartridges and related components
| Valterra number | Product | Factory specification | Ordering distinction |
|---|---|---|---|
| A01-1138 | Single exterior system | 5-micron carbon block; 1 GPM | Housing, cartridge, bracket and wrench |
| A01-1136 | Single exterior carbon cartridge | 5-micron; 1 GPM | Cartridge only; change after 500 gallons or six months |
| A01-1138BU | Single exterior replacement housing | Housing, cap and fittings | Does not include a new filter cartridge |
| A01-1139 | Dual exterior system | 10-micron sediment + 0.5-micron advanced carbon; 2 GPM | Two housings, two cartridges, bracket and wrench |
| A01-1137 | Exterior sediment prefilter pair | 10-micron sediment filtration | Two cartridges; confirm original housing/stage and fit |
Check the right replacement
Do not put the 5-micron A01-1136 in place of the dual system's finer 0.5-micron carbon stage without manufacturer confirmation. Valterra supplies separate 10-inch exterior cartridges for different jobs; size alone does not establish identical filtration or replacement fit. The A01-1138BU is a housing-only replacement, while A01-1138 includes a cartridge. Check the original canister identification, sealing O-ring and water-flow direction before changing a cartridge, and protect housings from freezing.