On The Go OTG4-DBLSOFT Portable RV Water Softener
- Item Weight: 32 pounds
- Number Of Items: 1
- Unit Count: 23 pounds
- Material Features: high grade premium resin
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A solid pick for RV or boat owners who want a hose-end softener that regenerates fast and stores in a small bay, as long as the plumbing stays limited to that use.
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ASIN: B00KVPNVJ6Model: OTG4-DBLSOFTCategory: Water Softeners
Overview
The OTG4-DBLSOFT is a portable water softener built for RVs and boats, using a 16,000-grain double-capacity resin bed that hooks to a standard garden hose between the park faucet and the rig. It needs no tools, no electrical hookup, and regenerates with two boxes of table salt in well under 30 minutes.
This is a double-standard unit, meaning it carries roughly twice the resin of The Go's base 8,000-grain model, so it runs longer between regenerations on the road. It is assembled in Indiana rather than imported, and the compact 22 in by 9.5 in dia housing is sized to fit a storage bay or dockside locker. The seller is explicit that this is built for RV and marine use only, not for plumbing into a shower or under a kitchen sink.
- 16,000-grain double-standard resin capacity
- Garden-hose connection between faucet and RV
- 22 in H x 9.5 in dia compact housing
- Carry handle plus a movable, levelable base
Who it's for
RV owners and boaters who want soft water at the campground or marina hookup without running power or hard-plumbing anything in. It suits anyone tired of scale buildup in an RV water heater or shower head during long trips.
Pros and cons
- No tools or electrical hookup needed to install or run
- Regenerates in under 30 minutes with plain table salt
- Compact 22 in by 9.5 in housing fits an RV bay or dock locker
- Movable base helps it sit level on uneven ground
- Not rated for shower or kitchen-sink plumbing
- Usable gallons drop sharply in very hard water
- Requires keeping table salt on hand for regeneration
Performance notes
Capacity depends entirely on source water hardness. At 11 grains per gallon (GPG), the 16,000-grain resin bed is rated for around 1,454 gallons before needing to regenerate; in much harder water around 58 GPG that drops to roughly 275 gallons. Regeneration itself is quick: two boxes of common table salt and under 30 minutes, with no tools or wiring involved.
Specifications
| Brand | On The Go |
|---|---|
| Model | OTG4-DBLSOFT |
| Dimensions & fit | |
| Item Weight | 32 pounds |
| Package Size Name | Single |
| Construction & materials | |
| Material Features | high grade premium resin |
| Included components | |
| Unit Count | 23 pounds |
| Other details | |
| Number Of Items | 1 |
| Part Number | OTG4-DBLSOFT |
| Product Benefits | Softening |
| Item Form | rv water softener, portable water softener, 16,000 grain water softener |
| Scent | Water |
Frequently asked questions
How many gallons does the OTG4-DBLSOFT provide before regenerating?
It depends on source water hardness: around 1,454 gallons at 11 GPG, or roughly 275 gallons at 58 GPG, based on the manufacturer's grain-capacity math.
Can the OTG4-DBLSOFT be plumbed into a shower or under a kitchen sink?
No. The manufacturer states this unit is built for RV and marine use and is not designed for shower or under-sink installation.
What does regenerating the OTG4-DBLSOFT involve?
Two boxes of common table salt and under 30 minutes, with no tools or electricity required.