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The 43 gallons RV fresh water tank from ICON is built for RV owners replacing a damaged water tank or planning a custom plumbing layout around exact measurements. The WT3856 gives you an OEM-grade fresh water tank option sized at 49.75" x 41.75" x 5", which helps you compare compartment space before you commit to a replacement.
This ICON fresh water tank is best chosen by verified dimensions, listed capacity, and the specific fitting configuration shown for this model. If you are matching an existing RV water system, confirm the port layout from the product image before ordering.
Features & Specifications
- ICON WT3856 43 gallons RV fresh water tank for RV water system replacement or custom installs.
- Measures 49.75" x 41.75" x 5" for fitment planning before you order.
- Blank tank-only design with no factory-installed fittings.
- Made from impact-resistant polyethylene.
- BPA free and mold resistant for potable water use.
- Certified to IAPMO and CSA standards according to ICON product data.
Why Choose ICON WT3856?
This 43 gallons RV fresh water tank helps buyers solve the biggest tank-replacement problem: finding a tank that actually fits the available space. Instead of relying on a generic capacity match alone, you can use the 49.75" x 41.75" x 5" footprint and the listed configuration to compare against your current setup.
Because this 43 gallons RV fresh water tank is made by ICON and sold as an OEM-grade replacement part, it is a strong option for repair shops, renovators, and RV owners who need a dependable fresh water tank without guessing on basic specs.
Compare Fresh Water Tanks
Not sure which RV fresh water tank is right for your setup? Here is a quick comparison of verified ICON alternatives in our catalog.
| Model | Capacity | Dimensions | Best For | View Details |
|---|---|---|---|---|
| ICON WT3856 - Part WT3856 | 43 Gallons | 49.75" x 41.75" x 5" | RV tank replacement when you need this exact capacity and footprint. | Current Product |
| ICON WT3544 - Part WT3544 | 42 Gallons | - 60" x 31" x 5.75 -" | Nearby capacity alternative when your compartment dimensions are different. | View Details |
| ICON WT3544 - Part WT3544 | 42 Gallons | 60" x 31" x 5 3/4" | Nearby capacity alternative when your compartment dimensions are different. | View Details |
| ICON WT3544 - Part WT3544 | 42 Gallons | 60" x 31" x 5 3/4" | Nearby capacity alternative when your compartment dimensions are different. | View Details |
Tip: Match the tank by dimensions and fitting layout first, then use gallon capacity as a secondary check.
Technical Specifications
- Brand: ICON
- Part Number: WT3856
- Capacity: 43 Gallons
- Dimensions: 49.75" x 41.75" x 5"
- Configuration: Tank Only
- Material: Impact-resistant polyethylene
- Certifications: IAPMO and CSA
What's Included
- One ICON WT3856 fresh water tank.
- No additional fittings, hardware, or accessories unless shown or stated in the product configuration.
Compatible Models & Alternatives
If this tank is close but not exact for your RV, compare these verified ICON fresh water tank alternatives:
- ICON - 42 Gallons RV Fresh Water Tank - 60" x 31" x 5.75" - WT3544 - 0246089
- ICON - 42 Gallon Jayco RV Water Tank 60" x 31" x 5 3/4" WT3544/AmeriKart 0210337
- ICON - 42 Gallon Jayco RV Water Tank 60" x 31" x 5 3/4" WT3544/AmeriKart 0210338
Frequently Asked Questions
Is this 43 gallons RV fresh water tank safe for drinking water?
ICON states its fresh water tanks are BPA free, mold resistant, and safe for drinking water.
How do I know if this ICON WT3856 tank will fit my RV?
Measure your available compartment space and compare it to the listed 49.75" x 41.75" x 5" dimensions before ordering.
Does this tank include fittings?
No. This model is listed as tank only.
Can I use this tank for a custom RV build?
Yes. Many buyers use ICON fresh water tanks for custom installs, but you should verify dimensions and port layout before purchase.
What is the best way to choose between similar RV fresh water tanks?
Start with exact dimensions and fitting layout, then compare gallon capacity and installation constraints.
Why Buy from Elkhart RV Parts?
Elkhart RV Parts carries OEM-grade RV replacement parts with verified product data, fast catalog access, and real comparison options so you can buy the right tank with more confidence.
| Product type | Fresh Water Tank |
|---|---|
| Brand | ICON |
| Model number | WT3856 |
| Capacity | 43 Gallons |
| Dimensions | 49.75 x 41.75 x 5 inches |
| Material | Polyethylene |
| Impact resistant | true |
| Bpa free | true |
| Mold resistant | true |
| Drinking water safe | true |
| Certifications | IAPMO, CSA |
| Configuration options | Tank only or with pre-installed fittings |
| Replaces | Forest River 0275 |
- What are the dimensions of the icon fresh water tank wt3856? The dimensions of the ICON Fresh Water Tank WT3856 are 49.75 inches by 41.75 inches by 5 inches.
- Is the icon fresh water tank safe for drinking water? Yes, the ICON Fresh Water Tank is BPA free, mold resistant, and certified to IAPMO and CSA standards, making it safe for drinking water.
- What material is the icon fresh water tank made from? The ICON Fresh Water Tank is made of durable and impact resistant polyethylene.
- Does the icon fresh water tank come with pre-installed fittings? There are many different options to choose from, including tank only options and tanks with pre-installed fittings.
- What is the capacity of the icon fresh water tank wt3856? The ICON Fresh Water Tank WT3856 has a capacity of 43 gallons.
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.