Shurflo Accumulator Tanks

Shurflo Accumulator Tanks: Engineered for Steady, Reliable Water Pressure

When it comes to managing water pressure in RVs, boats, and off-grid systems, few names carry the authority that Shurflo does. Established in 1968, Shurflo — now part of Pentair — has spent more than five decades engineering fluid handling solutions trusted by RV enthusiasts, marine professionals, and industrial operators worldwide. Their accumulator tanks are a natural extension of that expertise, purpose-built to work in harmony with Shurflo's own diaphragm pump systems and compatible with virtually any demand-style water pump on the market.

What Makes Shurflo Accumulator Tanks Stand Out

A pressure pump without an accumulator tank can feel like driving on a bumpy road — every time a faucet opens or closes, the pump kicks on and off, creating annoying pulsation and wearing out the motor prematurely. Shurflo's accumulator tanks solve this problem at the source. The flagship 182 Series (model 182-200) and the 181 Series (model 181-201) are the two core offerings, both engineered around a signature internal diaphragm technology that separates Shurflo from the competition.

Rather than relying on a simple air pocket at the top of a standard tank, Shurflo accumulator tanks feature a patented domed displacement diaphragm — constructed from butyl rubber — that actively cushions pressure surges and maintains stored pressure over the long term. Traditional air-pocket tanks can lose their charge within days; Shurflo's butyl rubber diaphragm is designed to hold pressure for years under normal use. Both tanks come pre-pressurized to 30 PSI and are rated for working pressures up to 125 PSI, making them suitable for a wide range of plumbing configurations.

Key Features and Benefits

• Patented domed diaphragm design: Minimizes noise and reduces power consumption compared to conventional tank designs.
• Reduces pump cycling: Stores pressurized water so the pump runs less frequently, lowering motor heat and extending pump lifespan.
• Smooths water faucet pulses: Delivers consistent, even flow — no more annoying pressure spikes when opening or closing fixtures.
• No taste or odor transfer: The bladder material is inert and does not affect water quality.
• Sturdy nylon housing: Lightweight yet durable construction keeps weight low in mobile applications like RVs and boats.
• Compact footprint: The 24 oz. capacity tanks (approximately 42.8 cubic inches / 0.7 liters total volume) are sized to fit in tight spaces typical of coach and marine plumbing bays.
• Universal compatibility: Installs in-line after any demand-style pump; can be used alone or in multiples for greater capacity.

Ideal Applications

Shurflo accumulator tanks are most at home downstream of a pressure-switch-controlled pump in an RV fresh water system, a liveaboard or cruising boat, a tiny home, or any off-grid cabin plumbing setup. Because they connect to the main water distribution line after the pump, installation is straightforward and typically requires only basic plumbing fittings — the 182-200 kit even includes a female-to-female coupler fitting to get you started. Whether you're retrofitting an older system to quiet down an overworked pump or specifying components for a new build, Shurflo's accumulator tanks deliver a measurable improvement in system performance and pump longevity.

Explore the full range of accumulator tanks available, or browse the complete Shurflo product lineup to find pumps, filters, and accessories that pair seamlessly with these tanks.