1. RV, Trailer & Camper Parts On Sale
  2. sku: 7440661261742751
  3. THETFORD 1638478

THETFORD 1638478 Dump Cap 8710315544411

1638478 Thetford Dump Cap Yellow

( Brand: Thetford ), ( Part Type: Cap ), ( Manufacturer Part Number: 1638478 ), ( UPC: 710315544411 )

Review THETFORD Dump Cap Yellow

The Thetford 1638478 Dump Cap is a high-quality, functional addition to any RV or camper's wastewater system. This cap is designed to fit standard 4-inch dump valves and is made from heavy-dight, impact-resistant ABS plastic, ensuring durability and long-lasting performance.

The Dump Cap features a sleek, modern design with a smooth, glossy finish that not only looks great but also makes cleaning a breeze. The cap is equipped with a built-in, locking lever that securely seals the dump valve when not in use, preventing unwanted odors from escaping and keeping your camping area pleasant.

The Thetford 1638478 Dump Cap is also designed with convenience in mind. The cap has a conveniently placed handle that makes it easy to lift and empty the waste tank, and the cap's large, 4-inch diameter opening ensures a quick and efficient dumping process. The cap's design also allows for easy attachment and detachment from the dump valve, making it a versatile and adaptable solution for any RV or camper.

In addition to its functional benefits, the Thetford 1638478 Dump Cap is also built to withstand the rigors of the road. The cap is resistant to UV rays, ensuring that it won't fade or crack over time, and it's also resistant to chemicals and harsh environments, making it a reliable and long-lasting choice for your RV or camper.

Overall, the Thetford 1638478 Dump Cap is a must-have accessory for any RV or camper owner. Its durability, convenience, and modern design make it a standout choice in the market, and its ability to effectively seal and prevent odors makes it an essential component of any wastewater system. Whether you're a seasoned RV traveler or a new camper, the Thetford 1638478 Dump Cap is a worthwhile investment that will make your camping experience more enjoyable and hassle-free.

The Thetford 1638478 dump cap is a popular choice among RV owners due to its durability and functionality. Here are some pros and cons to help you make an informed decision before purchasing:

Pros:

1. Robust Construction: The dump cap is made of high-impact polypropylene material that is resistant to cracks and scratches. This ensures long-lasting use.

2. Sealed Dump Valves: The dump cap comes with two sealed dump valves that prevent odors from escaping while the tank is being emptied.

3. Convenient Design: The design of the dump cap allows for easy access to the sewer connection, making it easier to empty the tanks.

4. Lightweight: Despite its robust construction, the dump cap is lightweight and easy to maneuver.

Cons:

1. Price: The Thetford 1638478 dump cap is more expensive than some other options in the market.

2. May Not Fit All RVs: This dump cap is designed to fit specific RV models, and it may not fit all RVs. It is essential to check the compatibility before purchasing.

3. Installation: Installing the dump cap can be a challenging process, especially for those without plumbing experience.

In conclusion, the Thetford 1638478 dump cap is a high-quality product that offers several advantages, such as robust construction, sealed dump valves, and a convenient design. However, it comes with a higher price tag and may not fit all RV models. If you own a compatible RV and are willing to pay a premium for a durable and functional dump cap, then it is an excellent investment. If not, you may want to consider other options in the market that may better suit your needs and budget.

Details:

For kits, photo might show entire kit and listing is only for one component. DUMP CAP YELLOW,:: YELLOW. Note: Photos do not always represent the actual product.

part #: 1638478 prices

  • $9.45-$20.35

specifications rvroutine:

  • brand: Thetford
  • part type: Cap
  • manufacturer part number: 1638478
  • upc: 710315544411

returns rvroutine:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller

general rvroutine:

  • condition: New
  • Parts Accessories > RV, Trailer Camper Parts Accessories > Other RV, Trailer Camper Parts Accessories

shipping rvroutine:

  • transit: 3-5 Days
  • cost: $0.00
  • type: Fixed
  • service: Standard
  • class: Standard

seller rvroutine:

  • city: USA
  • rating: 98.5%
  • # reviews: 81908

offer rvroutine:

  • options: Ship-to-home
  • quantity: 3
  • availability: In Stock
  • sold: 0
  • started: August 15, 2025

payments rvroutine:

  • credit card: Diners-club
  • wallet: Paypal
  • other
part type: cap,
category: auto parts > rv, trailer camper parts accessories, sku: 7440661261742751,

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5 offers $9.45–$20.35 USD
  • New. Offer #1 priced at $20.35 + $0.00 delivery = $20.35* total. Introducing the Thetford Dump Cap in a vibrant yellow color! With its durable construction and user-friendly design, this dump cap is a must-have accessory for any outdoor enthusiast or camper.FREE SHIPPING
  • New. Offer #2 priced at $9.45 + $8.10 delivery = $17.55* total. With a tighter fit than the original and a more resistant seal. Fits cassette toilets C2, C3, C4 models after year 2000.+$8.10 shipping
  • New. Offer #3 priced at $20.27 + $13.74 delivery = $34.01* total. Approx 70 mm across top Colour - Yellow. Part Number .+$13.74 shipping
  • New. Offer #4 priced at $13.59 + $48.01 delivery = $61.60* total. +$48.01 shipping
  • New. Offer #5 priced at $13.46 + $13.50 delivery = $26.96* total. Compatible with C2, C3, C4, and C200 cassette toilets. Manufacturer Part Number: .+$13.50 shipping

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