ReelUp tracking pixel Read the Privacy Policy
Skip to content
Buy Any 2 × 5L Chemicals
Get a FREE 11-Pack of Microfibre Cloths
Mix & Match | Limited Time
Buy Any 2 × 5L Chemicals
Get a FREE 11-Pack of Microfibre Cloths
Mix & Match | Limited Time

1.5 Inch Seal Kit to suit Black Gate / Dump Valves

SKU 20-0582
By: FLO-STAR
Save 6% Save 6%
Original price $39.00
Original price $39.00 - Original price $39.00
Original price $39.00
Current price $36.85
$36.85 - $36.85
Current price $36.85
Availability: This product will be delivered in 3-5 business days
Size: Kit
Colour: Black

SECURED SSL CHECKOUT GUARANTEED

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

Delivery Notice:

Please allow 3-5 business days for processing before it's ready for delivery or pickup. All standard delivery options still apply.

Want to Order This Item in Bulk?

Get a quote by contacting us.

Contact Us

Valterra 1.5 Inch Seal Kit – Waste Dump Valve Replacement Seals (20-0582)

Instantly stop hazardous leaks and restore the absolute watertight integrity of your RV or industrial waste system with the genuine Valterra 1.5 Inch Seal Kit (20-0582). In caravan black water systems, marine holding tanks, and commercial fluid management, the gate (dump) valve is the critical barrier holding back hazardous waste. Over time, exposure to harsh chemicals, abrasive solids, and extreme temperature fluctuations causes the internal rubber seals to dry out, warp, or tear. A failing seal results in highly unsanitary, illegal waste leaks. This premium dump valve seal kit acts as the perfect, exact-fit replacement, instantly returning your 1.5-inch gate valve to flawless, factory-level, leak-proof operation.

Replacing an entire, expensive gate valve assembly just because the internal rubber seals degraded is an unnecessary waste of money and labor. This genuine Valterra repair kit includes the specific, heavy-duty rubber seals and essential hardware required to completely rebuild the internal sealing matrix of the valve. Engineered from highly specialized, chemical-resistant rubber, these seals are designed to withstand constant friction from the sliding gate blade while holding back massive fluid pressure. Specifically manufactured to suit Valterra 1.5 Inch Black Gate/Dump Valves, this vital valve replacement kit is the ultimate maintenance solution for RV owners, marine mechanics, and industrial plumbers.

Who Is This Valterra 1.5 Inch Seal Kit Ideal For?

The 20-0582 Seal Kit delivers genuine Valterra chemical resistance and airtight sealing. It is highly recommended for:

  • Caravan & RV Owners: Fixing hazardous, dripping black-water or grey-water waste tanks by rebuilding their existing 1.5-inch gate valve with a brand-new dump valve seal kit instead of paying a mechanic to replace the whole unit.
  • Marine Mechanics & Boat Owners: Sourcing authentic, highly reliable valve replacement kits to safely repair the holding tank dump valves on marine vessels, ensuring strict compliance with maritime waste laws.
  • Industrial Plumbers & Facility Managers: Executing cost-effective, component-level repairs on commercial fluid management systems utilizing 1.5-inch Valterra gate valves.
  • Equipment Hire Companies: Ensuring their fleet of rental caravans or portable toilets do not leak hazardous waste by proactively replacing the rubber seals during routine maintenance.

Key Features and Performance Benefits:

  • Eliminates Hazardous Leaks: A torn seal causes raw waste or grey water to constantly drip from the plumbing. This brand-new set of heavy-duty rubber seals completely stops leaks, restoring absolute sanitary security.
  • Genuine Valterra Quality: 100% authentic OEM replacement parts (Replaces 1001-9PB). This guarantees flawless dimensional compatibility, ensuring the seals seat perfectly inside the valve housing without binding against the gate blade.
  • Chemical-Resistant Rubber: Manufactured from premium, highly specialized rubber compounds designed explicitly to survive constant exposure to harsh toilet chemicals, waste, and severe temperature fluctuations without rotting.
  • Massive Cost Savings: Completely eliminates the need to cut PVC pipes and replace an entire, perfectly good gate valve assembly simply because the internal rubber rings wore out.
  • Exact 1.5-Inch Fitment: Precision-engineered as a direct drop-in replacement specifically for all Valterra 1.5 Inch Black Gate / Dump Valves.

Technical Specifications & Compatibility:

  • Brand: Valterra (Genuine OEM Parts)
  • Product Type: Gate Valve Seal Kit / Dump Valve Replacement Seals
  • Part Number: 20-0582
  • Manufacturer Part Number: 1001-9PB
  • Valve Size Compatibility: 1.5 Inch (38mm)
  • Material: Heavy-Duty Chemical-Resistant Rubber
  • Application: RV waste systems, marine holding tanks, industrial fluid valves.
  • Compatible Machine / Tool: Suits Valterra 1.5 Inch Black Gate/Dump Valves.

Dispatch: Items marked as “In stock” or “Ready to be shipped” are usually dispatched within 1 business day after payment is received. If an item is not in stock and ordered from our supplier, please allow 3–5 business days for processing before it is ready for delivery or pickup. All standard delivery options still apply.

Shipping: Delivery costs are calculated at checkout based on your location and order size. Bulky items and chemicals may attract additional freight charges and cannot be sent to PO Boxes.

Delivery: Parcels are delivered by road freight. Authority to leave may be used if no one is available to receive the order. For full details, please see our Shipping & Delivery Policy

Business days to delivery

NSW
City 1 Day
VIC
Melbourne 1 Day
Regional 3–4 Days
QUEENSLAND
Brisbane 1–2 Days
Regional 3–4 Days
SOUTH AUSTRALIA
Adelaide 2–3 Days
Regional 4–5 Days
NORTHERN TERRITORY
All Areas 4–6 Days
WESTERN AUSTRALIA
All Areas 4–6 Days
TASMANIA
All Areas 4–6 Days
What is a 'Dump Valve' or 'Gate Valve'?

A dump valve (or gate valve) is the large plastic pull-handle valve located on the waste holding tanks of caravans, RVs, and boats. When you pull the handle, a flat plastic 'gate' blade slides up, allowing the waste water to dump out. These seals sit on either side of that sliding blade to stop the water from leaking.

How do I know if my seals need replacing?

If your dump valve is fully pushed closed, but waste water is still steadily dripping or leaking out of the pipe, or if the handle has become incredibly stiff and difficult to pull, the internal rubber seals have likely dried out, warped, or torn and must be replaced.

Is this a genuine Valterra part?

Yes, absolutely. This is a 100% authentic Valterra OEM seal kit (Part Number 20-0582 / 1001-9PB), guaranteeing it will fit the exact tolerances of your Valterra 1.5-inch valve.

Will this fit a 3-Inch valve?

No. RVs typically have a 1.5-inch valve for 'Grey Water' (sinks/showers) and a massive 3-inch valve for 'Black Water' (toilets). This specific seal kit is ONLY for the smaller 1.5-inch valves. You must measure your valve before purchasing.

Do I have to cut my PVC pipes to install this?

No! That is the massive advantage of a seal kit. You simply unbolt the four bolts holding the two halves of the valve body together, slide the old valve out, replace the rubber seals on the sides, and bolt it back together. No pipe cutting or gluing is required.

Why buy just the seals instead of a whole new valve?

The hard plastic body and metal handle of a Valterra valve almost never break; it is only the rubber seals that rot over time. Buying just the seal kit is significantly cheaper and much faster to install than a complete new valve.

Should I use grease or lubricant when installing the new seals?

Yes. It is highly recommended to coat the new rubber seals and the sliding plastic gate blade with a generous amount of plumber's silicone grease during installation. This ensures the blade slides smoothly and prevents the new seals from catching or tearing.

Can I use Vaseline or WD-40 to lubricate the seals?

Absolutely NOT. Petroleum-based products like Vaseline or WD-40 will instantly attack the rubber, causing it to swell, turn to mush, and fail within weeks. You MUST use a 100% silicone-based plumber's grease.

Are the seals resistant to toilet chemicals?

Yes. These genuine Valterra seals are manufactured from highly specialized rubber compounds engineered specifically to withstand the harsh breakdown chemicals and deodorizers used in RV holding tanks.

Will this kit fit other brands like Bristol or Camco?

While some RV valve parts look similar, they often have slight dimensional differences that cause leaks. This kit is strictly engineered and guaranteed to fit Valterra brand 1.5-inch valves.

Is it a difficult repair for a homeowner to do?

It is a very common and straightforward DIY repair for RV owners. It generally only requires a spanner or screwdriver to remove the four outer bolts on the valve body. (Just ensure your holding tanks are completely empty before unbolting the valve!)

Do you offer trade pricing for RV mechanics?

Yes, Freshway Supplies provides highly competitive volume pricing and trade accounts for RV repair workshops, marine mechanics, and facility managers. Contact us to establish your trade account for spare parts.

Trusted by over 1,000 + Customers

Join thousands who rely on our products and service—real results and proven satisfaction.

RELATED PRODUCTS

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

class=" product-compare-drawer__link button-primary disabled " href="/" data-product-compare-drawer-link data-product-compare-drawer-link-text="Compare" > Compare