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1.5 Inch External Gasket Black to suit Valterra Gate / Dump Valves - Individual / Carpet Extraction Parts

1.5 Inch External Gasket Black to suit Valterra Black Gate / Dump Valves

SKU 20-0579
By: Valterra
$17.50 - $17.50
$17.50
$17.50 - $17.50
$17.50
Availability: This product will be delivered in 3-5 business days
Size: Individual
Colour: Black

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Delivery Notice:

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

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Product Description

Valterra 1.5 Inch External Gasket – Dump Valve Replacement Seals (20-0579)

Instantly cure severe exterior plumbing leaks and guarantee a completely watertight seal on your fluid management systems with the genuine Valterra 1.5 Inch External Gasket (20-0579). In commercial portable carpet extractors, RV grey-water holding tanks, and marine sanitation systems, the external flange connection of a dump valve is a major failure point. Over time, constant mechanical vibration, exposure to harsh chemicals, and extreme temperature fluctuations cause the original exterior rubber gasket to dry rot, crack, and fail. This premium dump valve replacement seal acts as the perfect, exact-fit repair solution, allowing you to instantly restore the airtight integrity of your 1.5-inch gate valve assembly without the exorbitant cost of replacing the entire unit.

Using makeshift sealants or incorrect rubber sizes on high-volume waste valves almost always leads to catastrophic, highly unsanitary leaks. This authentic Valterra component is manufactured from highly specialized, chemical-resistant black rubber. It is engineered to sit perfectly between the valve body flanges, creating a heavily compressed, impenetrable barrier against waste water and aggressive chemicals. Designed as a direct drop-in replacement (Manufacturer PN: 7150), this essential valve replacement kit component is the ultimate, highly affordable maintenance investment for professional carpet cleaning technicians, industrial plumbers, and caravan mechanics.

Who Is This Valterra 1.5 Inch External Gasket Ideal For?

The 20-0579 Gasket delivers genuine Valterra chemical resistance and airtight sealing. It is highly recommended for:

  • Commercial Carpet Cleaners: Repairing dripping exterior flanges on the dirty-water recovery tanks of their portable extraction machines, utilizing a genuine dump valve replacement seal to ensure zero water leaks on clients' carpets.
  • RV & Caravan Mechanics: Sourcing authentic, highly reliable valve replacement kits to safely repair the external flanges of grey-water holding tanks, ensuring strict compliance with caravan park sanitation rules.
  • Marine Mechanics & Boat Owners: Executing cost-effective, component-level repairs on marine holding tank valves using premium, degradation-resistant rubber that survives harsh saltwater and chemical exposure.
  • Industrial Facility Managers: Keeping a bulk supply of exact-fit replacement gaskets on hand to rapidly stop leaks on low-pressure agricultural or chemical fluid management systems utilizing 1.5-inch Valterra valves.

Key Features and Performance Benefits:

  • Eliminates External Leaks: A flattened or cracked external gasket causes waste water to drip continuously from the valve flange. This brand-new, thick rubber gasket compresses perfectly to permanently stop the leak.
  • Genuine Valterra Quality: 100% authentic OEM replacement part (Replaces 7150). This guarantees flawless dimensional compatibility, ensuring it aligns perfectly with the 4-bolt flange of a 1.5-inch Valterra valve.
  • Chemical-Resistant Rubber: Manufactured from premium, highly specialized rubber compounds designed explicitly to survive constant exposure to harsh toilet breakdown chemicals, deodorizers, and industrial detergents without rotting.
  • Massive Cost Savings: Completely eliminates the need to replace an entire, perfectly functional gate valve assembly simply because the external rubber seal degraded over time.
  • Simple Bolt-On Installation: Easily installed by unbolting the valve flanges, removing the old flat gasket, and inserting this brand-new rubber ring before clamping the bolts back down.

Technical Specifications & Compatibility:

  • Brand: Valterra (Genuine OEM Part)
  • Product Type: External Gasket / Dump Valve Replacement Seal
  • Part Number: 20-0579
  • Manufacturer Part Number: 7150
  • Material: Heavy-Duty Chemical-Resistant Black Rubber
  • Application: Sealing external flanges on RV waste systems, carpet machines, and holding tanks.
  • Compatible Machine / Tool: Specifically suits Valterra 1.5 Inch Black Gate / Dump Valves.
Delivery Information

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
Frequently Asked Questions
What is an 'External Gasket' on a dump valve?

The external gasket is the rubber sealing ring that sits between the main body of the dump valve and the pipe flange it bolts onto. It prevents water from leaking out of the bolted connection points.

Is this gasket for the inside of the valve where the blade slides?

No. This is the 'External Gasket' (Part 20-0579). If you need the internal seals that hug the sliding plastic guillotine blade, you need a different part, known as an internal seal kit.

Is this a genuine Valterra part?

Yes, absolutely. This is a 100% authentic Valterra OEM replacement gasket (Part Number 20-0579 / 7150), guaranteeing it will fit the exact tolerances of your 1.5-inch valve flange.

Will this fit a 3-Inch RV toilet valve?

No. This specific external gasket is explicitly sized for the smaller 1.5-inch 'Grey Water' valves. It will be far too small to fit the flanges on a massive 3-inch 'Black Water' dump valve.

Why is my valve leaking from the outside edge?

If water is dripping from the seam where the valve bolts together, the external gasket has dried out, flattened, or cracked. Replacing this rubber gasket will restore the compression seal and stop the drip instantly.

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

Generally, no. Because the valve is bolted between two flanges, you simply undo the four metal bolts holding the assembly together, spread the flanges slightly, pull the old gasket out, and slide this new one in.

Should I use glue or silicone sealant on this gasket?

No. High-quality rubber gaskets are designed to seal purely through mechanical compression when you tighten the bolts. Using silicone can actually cause the gasket to slip out of place under pressure.

Are the seals resistant to toilet chemicals?

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

Will this gasket fit other brands like Bristol or Camco?

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

Does this listing include two gaskets?

This listing is for a single (1x) individual external gasket. A complete valve installation typically utilizes one gasket on each side of the valve body, so you may need to order two if rebuilding the entire unit.

Is it a difficult repair to do myself?

It is a very straightforward DIY repair. 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 starting!

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 carpet cleaning technicians. Contact us to establish your account.

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