Hydropneumatic Tank Philippines: Bladder Pressure Tanks for Commercial Booster Systems

A hydropneumatic tank is a sealed vessel holding water on one side of a flexible bladder or diaphragm and compressed air on the other. When the booster pump runs, water enters the tank and compresses the air. When a tap, a shower riser or a process line opens, that compressed air pushes water back into the system before the pump has to start. This stored volume is called drawdown, the reason a properly sized hydropneumatic tank is not optional on a commercial booster set. Without one, every small demand event starts the pump, and short-cycling is the single most common cause of premature motor and starter failure in Philippine mid-rise buildings.

The tank absorbs pressure transients when a pump stops, protecting fittings, flexible connectors and valve seats downstream. Buyers in the Philippines will hear the same equipment called a hydropneumatic tank, a pressure tank, a bladder tank or an expansion tank, and in most local specifications those terms point at the same component. JOHOB Hardware Trading supplies these tanks as part of complete pumping and pressure systems: booster, transfer and submersible sets, with VFD duplex control panels where the application calls for one.

Sizing is a two-step calculation, and any supplier who quotes a tank without asking for these numbers is guessing. Step one is drawdown: decide how much water you want the tank to deliver between pump starts, then work back to total tank volume using the pressure ratio: total volume equals required drawdown divided by (1 minus (absolute pre-charge pressure divided by absolute cut-out pressure)), working in absolute pressure by adding roughly 101 kPa of atmospheric pressure to your gauge readings. A narrow band between cut-in and cut-out needs a much larger tank for the same drawdown, so widening the band by even 0.5 bar often costs less than upsizing the vessel.

Step two is cycle rate: divide your target drawdown into the pump flow to check starts per hour at peak demand, compare against the starts-per-hour limit on the motor data sheet, and upsize if the tank permits more starts than the motor allows. Set pre-charge at roughly cut-in pressure with the tank empty, verified with a tyre gauge on commissioning day, not the delivery receipt. Send your flow in GPM or LPS, cut-in and cut-out settings and pump model, per our GPM to LPS pump conversion guide.

A hydropneumatic tank is only as good as the set it sits on, so we quote the tank and the pump together. JOHOB Hardware Trading sources from established pump brands including Grundfos, DAB and Speroni, and from CDL for Chinese engineered vertical multistage pumps where budget or lead time favours that route. Control side, we supply VFD duplex, SDE, star-delta and MCC panels, built by Chutian using Inovance drives.

The pairing decision comes down to control strategy. On a fixed-speed duplex set, the tank carries every small demand event so the motors are not switching all day. On a VFD set, the drive holds pressure by varying speed, so the tank is sized smaller and its job shifts to covering the sleep-mode restart and damping transients when the drive stops the last pump. Either way the tank still belongs on the system. If you are still choosing, read our comparison of VFD and fixed-speed pumps before you fix the tank size, because switching approaches after purchase usually means buying a second vessel.

Procurement and consultancy reviews in the Philippines normally ask for paperwork before they ask for price. Depending on the specific item supplied, certification on JOHOB-supplied equipment can include ISO 9001 manufacturer quality management systems, TUV SUD testing, CE marking on electrical items, and ASME on pressure vessels where applicable. A hydropneumatic tank is a pressure vessel, so if your specification calls for ASME documentation, state that in the enquiry and we will confirm at quotation whether the specific model and capacity you need carries it.

We are an industrial equipment supplier, not a manufacturer: we source from Philippine and Chinese factories and deliver with local warranty and after-sales support, unlike an importer who disappears after delivery. Where the project also needs bulk water storage, modular FRP, GRP, hot-dip galvanised and stainless steel tanks are supplied under our TankSmith sister brand, and the modular panels on that line carry WRAS certification.

Pricing on hydropneumatic tanks is quote-based and we do not publish price lists, since the number moves with capacity, connection size, the pump it pairs with and the delivery point. Standard lead times are 21 to 35 days for ex-stock items and 45 to 90 days for made-to-order equipment, so if your handover date is inside 30 days, tell us at enquiry stage and we will scope to what is available ex-stock.

On tax, 12 percent VAT applies to VAT-registered buyers, while PEZA and SBMA locators and exporters are quoted at zero-VAT, a material line item worth flagging in your enquiry so the quotation is correct the first time. Coverage runs nationwide, including the PEZA, SBMA and Clark economic zones. We respond to RFQs within one business day. Send the pump model, target flow, cut-in and cut-out pressures, connection size and delivery address for a costed quotation.

The buyers on this product are almost never buying a tank in isolation, since it is one line on a package that also includes pumps, a control panel, flexible connectors and valves. Commercial laundries need stable pressure across multiple washer fill cycles opening at once. Hotels need quiet, non-cycling plant rooms and consistent pressure on top floors during the morning peak. Hospitals need reliability and documented equipment. Food and beverage processors need pressure stability on wash-down lines. SBMA and PEZA locators need zero-VAT quotations and audit-ready paperwork.

Property managers usually arrive with a different problem: an existing booster set that is short-cycling or hammering the risers, which almost always traces back to a waterlogged or wrongly pre-charged tank rather than the pumps. Often the fix is a correctly sized replacement vessel and a corrected pre-charge, not a new pump set, and we will say so before quoting the more expensive option. Full product specifications are on our hydropneumatic bladder pressure tank page, and the equivalent 200 litre configuration is on our 200L diaphragm pressure tank page.

• Hydropneumatic Tank Supplier Philippines: RFQ and Delivery Terms
• Hydropneumatic Bladder Pressure Tank Specifications
• Complete Pump System Packages
• Guide: How to Size a Booster Pump
• 200L Diaphragm Pressure Tank Supplier

Reviewed: August 2026