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✓ ElkhartRVParts.com - The Only Authorized Place for ICON Technologies
✓ 100% Verified Authentic OEM Grade Part
The ICON H3977 29 Gallon RV Holding Tank delivers reliable waste management in a 52" x 22" x 8.25" design specifically engineered for Forest River and Coachmen RV applications. Engineered with extra-thick polyethylene construction and preinstalled drain and level sensors with specifically placed fittings, this IAPMO-certified tank provides durable black water or gray water storage as a direct replacement for Forest River part number 604325013 and Coachmen F100325350. Whether you're replacing a damaged tank or upgrading your Forest River or Coachmen RV's waste capacity, the H3977 offers professional-grade quality with exact-fit compatibility.
Features & Specifications
- 29 Gallon Capacity: Mid-size waste storage ideal for extended trips and weekend camping
- Forest River & Coachmen Fitment: Specifically placed fittings designed for Forest River and Coachmen RV applications
- Extra-Thick Material: Heavy-duty polyethylene construction resists cracking, warping, and chemical damage
- Preinstalled Sensors: Factory-installed drain and level sensors eliminate custom drilling and installation time
- Dual-Purpose Application: Suitable for black water or gray water storage depending on your RV configuration
- IAPMO & CSA Certified: Meets rigorous North American safety and quality standards for RV holding tanks
- Direct OEM Replacement: Replaces Forest River 604325013 and Coachmen F100325350 for exact-fit installation
Why Choose the ICON H3977 Holding Tank?
When you need a reliable 29-gallon holding tank designed specifically for Forest River and Coachmen RVs, the ICON H3977 delivers professional-grade quality with exact-fit compatibility. The extra-thick polyethylene construction provides superior durability compared to standard OEM tanks, while the preinstalled sensors and specifically placed fittings save you hours of installation time. The 29-gallon capacity provides ample waste storage for extended trips without taking up excessive underbelly space.
ICON Technologies has built a reputation for engineering holding tanks that outlast OEM replacements. The H3977's IAPMO and CSA certifications ensure you're getting a tank that meets strict safety standards for waste containment. Whether you're a DIY Forest River or Coachmen owner tackling a tank replacement or a mobile technician servicing customer rigs, the H3977 offers the perfect balance of capacity, quality, and OEM-specific fitment that makes installation straightforward and reliable.
Compare ICON Holding Tanks
Not sure if the 29-gallon H3977 is the right size for your RV? Compare it against other ICON holding tanks with similar mid-size capacities to find the perfect fit for your underbelly space and waste capacity needs.
| Model | Capacity | Dimensions | Best For | View Details |
|---|---|---|---|---|
| HT500-SD | 26 Gallons | 37.5" x 26" x 9.5" | Compact length, taller profile | View HT500-SD → |
| HT293SD | 28 Gallons | 63" x 24" x 7" | Similar capacity, longer/lower profile, left side drain | View HT293SD → |
| H3977 | 29 Gallons | 52" x 22" x 8.25" | Forest River/Coachmen replacement, specific fittings | Current Product |
| H3858 | 31 Gallons | 53.75" x 21.75" x 8.25" | 7% more capacity, similar dimensions | View H3858 → |
| H3925 | 33 Gallons | 56" x 36" x 5.5" | 14% more capacity, ultra low-profile, wider footprint | View H3925 → |
💡 Pro Tip: The H3977 features specifically placed fittings designed for Forest River and Coachmen applications. If you're replacing Forest River 604325013 or Coachmen F100325350, this is your exact-fit replacement. Verify your RV's underbelly dimensions before ordering.
Technical Specifications
- Part Number: H3977
- Manufacturer: ICON Technologies (Icon Direct)
- Capacity: 29 Gallons (109.8 Liters)
- Length: 52 inches
- Width: 22 inches
- Height: 8.25 inches
- Material: Extra-thick polyethylene (UV and chemical resistant)
- Construction: Seamless one-piece rotational molding
- Sensors: Preinstalled drain and level sensors
- Fittings: Specifically placed for Forest River and Coachmen applications
- Application: Black water or gray water holding tank
- Certifications: IAPMO and CSA certified
- Replaces: Forest River 604325013, Coachmen F100325350
- Weight: Approximately 30-35 lbs (empty)
- Ideal For: Forest River and Coachmen travel trailers, fifth wheels, motorhomes
What's Included
- ICON H3977 29-gallon holding tank with preinstalled sensors
- Factory-installed drain fitting (specifically placed for Forest River/Coachmen)
- Factory-installed level sensor probes
- IAPMO/CSA certification documentation
- Installation requires separate mounting hardware and plumbing connections (not included)
Note: This tank features specifically placed fittings designed for Forest River and Coachmen RV applications. Additional fittings, valves, and mounting straps may be needed depending on your specific RV configuration. Browse our tank fittings collection for compatible accessories.
Compatible Models & Alternatives
The ICON H3977 is a direct replacement for Forest River 604325013 and Coachmen F100325350 and fits many Forest River and Coachmen RV models. If you're looking for related products or alternative tank sizes, explore these options:
- Browse all RV holding tanks - Complete selection of black water and gray water tanks
- Tank fittings and accessories - Valves, sensors, drain fittings, and mounting hardware
- All ICON Technologies products - Complete ICON catalog including fresh water tanks
Frequently Asked Questions
How do I know if the H3977 will fit my Forest River or Coachmen RV?
The H3977 is designed as a direct replacement for Forest River part number 604325013 and Coachmen F100325350. Measure your existing tank or underbelly compartment to confirm: 52" length x 22" width x 8.25" height. The specifically placed fittings match the original Forest River and Coachmen tank configurations for straightforward installation.
Can I use this tank for both black water and gray water?
Yes, ICON holding tanks are designed for dual-purpose use. You can use the H3977 for black water (toilet waste), gray water (sink/shower drainage), or a combination system depending on your RV's plumbing configuration. The extra-thick polyethylene construction handles both applications.
What makes this tank specific to Forest River and Coachmen RVs?
The H3977 features specifically placed fittings that correspond to certain Forest River and Coachmen applications. This means the drain fitting, sensor locations, and mounting points are positioned to match the original equipment tank, making installation easier and ensuring proper fit without custom modifications.
Is 29 gallons enough capacity for extended trips?
A 29-gallon holding tank is ideal for extended trips for 1-2 people. For reference, a typical RV toilet flush uses about 0.5 gallons, so you'd get approximately 58 flushes before needing to dump. If you need more capacity, consider upgrading to the 31-gallon H3858 or 33-gallon H3925.
How do I install the H3977 holding tank?
Installation requires removing your old tank, positioning the H3977 in the underbelly compartment, securing it with mounting straps or brackets, and connecting the drain valve, vent line, and inlet plumbing. The specifically placed fittings should align with your existing Forest River or Coachmen plumbing connections. Professional installation is recommended if you're not experienced with RV plumbing systems.
What makes ICON tanks better than OEM Forest River or Coachmen tanks?
ICON tanks are engineered with extra-thick polyethylene material (thicker than many OEM tanks), providing superior resistance to cracking, warping, and chemical damage. The seamless rotational molding process eliminates weak joints, and IAPMO/CSA certifications ensure the tank meets rigorous safety standards. Many Forest River and Coachmen owners report ICON tanks outlasting their original equipment tanks.
Why Buy from Elkhart RV Parts?
As an authorized ICON Technologies dealer, Elkhart RV Parts guarantees 100% authentic OEM-grade holding tanks backed by manufacturer warranties. Our team specializes in RV plumbing components and can help you select the right tank size and configuration for your specific Forest River or Coachmen RV model. Every ICON tank we sell is built to rigorous IAPMO and CSA standards, ensuring safe and reliable waste management for years of RV adventures.
Need Help Selecting the Right Holding Tank?
Our AI Live Chat can help you find the perfect ICON holding tank based on your RV's underbelly dimensions and waste capacity requirements. Get instant answers about compatibility, installation, and tank sizing for Forest River and Coachmen RVs.
| Width (inches) | 22 |
|---|---|
| Height (inches) | 8.25 |
| Length (inches) | 52 |
| Capacity (gallons) | 29 |
| Material thickness | thicker amount of material |
- What are the dimensions of the icon holding tank h3977? The ICON Holding Tank H3977 measures 52 inches in length, 22 inches in width, and 8.25 inches in height.
- What is the capacity of this holding tank? This holding tank has a capacity of 29 gallons.
- Is the icon holding tank h3977 suitable for both black and gray water? Yes, the tank can be used for black water, gray water, or a combination of both.
- Does this tank come with preinstalled fittings or sensors? Most ICON tanks, including this one, have preinstalled drain and level sensors, but you should view the product image carefully to confirm the fittings.
- Is this holding tank certified for quality and safety? Yes, the ICON Holding Tank is certified to meet IAPMO and CSA standards, ensuring durability and safety.
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