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The 40 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 WT3618 gives you an OEM-grade fresh water tank option sized at 42" x 23 1/2" x 10", 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 WT3618 40 gallons RV fresh water tank for RV water system replacement or custom installs.
- Measures 42" x 23 1/2" x 10" for fitment planning before you order.
- Configured with AmeriKart #0219280 as listed by ICON.
- 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 WT3618?
This 40 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 42" x 23 1/2" x 10" footprint and the listed configuration to compare against your current setup.
Because this 40 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 WT3618 - Part WT3618 | 40 Gallons | 42" x 23 1/2" x 10" | RV tank replacement when you need this exact capacity and footprint. | Current Product |
| ICON WT3618 - Part WT3618 | 40 Gallons | - 42" x 23.5" x 10 -" | Nearby capacity alternative when your compartment dimensions are different. | View Details |
| ICON WT3618 - Part WT3618 | 40 Gallons | 42" x 23 1/2" x 10" | Nearby capacity alternative when your compartment dimensions are different. | View Details |
| ICON WT3618 - Part WT3618 | 40 Gallons | 42" x 23 1/2" x 10" | 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: WT3618
- Capacity: 40 Gallons
- Dimensions: 42" x 23 1/2" x 10"
- Configuration: AmeriKart #0219280
- Material: Impact-resistant polyethylene
- Certifications: IAPMO and CSA
What's Included
- One ICON WT3618 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 - 40 Gallons RV Fresh Water Tank - 42" x 23.5" x 10" - WT3618 - w/ .5" Fittings
- ICON - 40 Gallon RV Water Tank 42" x 23 1/2" x 10" WT3618 AmeriKart #0244751
- ICON - 40 Gallon RV Water Tank 42" x 23 1/2" x 10" WT3618 AmeriKart #0219279
Frequently Asked Questions
Is this 40 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 WT3618 tank will fit my RV?
Measure your available compartment space and compare it to the listed 42" x 23 1/2" x 10" dimensions before ordering.
Does this tank include fittings?
Use the listed configuration and product image to confirm the included fitting layout for this model.
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 |
| Capacity | 40 Gallons |
| Dimensions | 42" x 23 1/2" x 10" |
| Model number | WT3618 |
| Part number | 0219280 |
| Manufacturer | AmeriKart |
| Construction | Roto-molded, one piece with spin welded components |
| Material | Roto-molded plastic |
| Compatibility | Jayco RV Fifth Wheels, Travel Trailers, Campers |
| Features | Impact resistant, OEM-part replacement |
| Certification | IAPMO certified |
| Application | Fresh water storage |
- What is the capacity of the icon rv water tank? The ICON RV water tank has a capacity of 40 gallons.
- Is this water tank compatible with my jayco rv? Yes, this fresh water tank has specifically placed fittings designed to correspond with certain Jayco applications.
- What material is the water tank made from? The water tank is made from high-quality, durable polyethylene that is FDA-approved for safe drinking water storage.
- How is the construction of the tank designed for durability? The tank features seamless one-piece roto-molded construction with spin welded components, making it impact resistant, leak-proof, and highly durable.
- Is this water tank resistant to stains, corrosion, and rust? Yes, the tank is designed to be stain, corrosion, and rust resistant, ensuring it remains clean and functional for years of use.
Product Documents & Manuals
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.