Aquatec 5800 Series Water Delivery / Demand Pump — 115 VAC
This item is not currently in stock. It is on order and we expect it in our warehouse on or around October 20, 2026. Ordering now reserves a unit from that incoming shipment — we ship within one to two business days of it arriving.
To cancel for a full refund, email support@isopurewater.com or call 714-541-6600 any time before the item ships. Credit card refunds are issued within one billing cycle. If we learn we can’t ship by the date above, we’ll email you a revised shipping date and the option to cancel.
5800 Series Water Delivery Pump
Self-priming diaphragm pump with push-to-connect fittings for reverse osmosis delivery and low-pressure boosting on standard household power, available with an integral pressure switch or an internal bypass.
The Aquatec 5800 Series draws water from an atmospheric holding tank and pressurises it, or boosts an existing low-pressure line. It is the standard choice for moving RO water to a faucet, refrigerator, or ice maker located more than a few feet from the system. Every model on this page runs on 115 VAC household power. All but one ship with the pressure switch factory-set, so the pump starts when you open the tap and stops when the line is satisfied. The exception is the 5843-8D02-B574, which has an internal 50 PSI bypass and no pressure switch. One high-pressure model rated to 130 PSI is also available below.
Match the Flow and Pressure to the Job
| Part Number | Flow (open) | Control | Ports | Best for |
|---|---|---|---|---|
| 5851-7E12-J574 | 0.70 GPM | 60 PSI switch | 3/8" | Standard under-sink RO faucet and short ice maker runs |
| 5852-7E12-J574 | 0.90 GPM | 60 PSI switch | 3/8" | RO faucet plus a refrigerator line |
| 5852-1E13-B574 | 0.90 GPM | 60 PSI switch | 3/8" | OEM builds — supplied without a power cord |
| 5843-8D02-B574 | 0.90 GPM | 50 PSI bypass — no switch | 1/4" | Delivery-mode OEM builds in 1/4" tubing, run by an external control — supplied without a power cord |
| 5853-1E12-J574 | 0.98 GPM | 60 PSI switch | 3/8" | Longer runs where 0.7 GPM falls short |
| 5851-1L12-J584 | 0.99 GPM | 130 PSI switch | 3/8" | High-pressure transfer and vertical lift |
| 5852-7E12-J584 | 1.22 GPM | 60 PSI switch | 3/8" | Two fixtures fed from one storage tank |
| 5853-1E12-B524 | 1.70 GPM | 60 PSI switch | 3/8" | High flow, OEM — supplied without a power cord |
| 5853-1E12-J524 | 1.70 GPM | 60 PSI switch | 3/8" | High flow for light commercial delivery |
| 5853-7E12-J524 | 1.70 GPM | 60 PSI switch | 3/8" | High flow for light commercial delivery |
| 5852-7F12-J604 | 1.85 GPM | 70 PSI switch | 3/8" | Highest flow and pressure in the fixed-speed range |
How to read the part number: the first digit of the middle block is the control — 1 or 7 = pressure switch, 8 = internal bypass with no switch. The letter after it sets the pressure: the shut-off point on switch models, the bypass point on bypass models — D = 50 PSI, E = 60 PSI, F = 70 PSI, L = 130 PSI. The third digit of the first block sets the ports: 4 = 1/4" push-to-connect, 5 = 3/8" push-to-connect. Flow figures above are open flow; flow at the rated pressure is lower, which is normal for a diaphragm pump.
5843-8D02-B574 is a bypass pump, not a demand pump: it has no pressure switch, so it runs whenever it has power. When the outlet closes, the internal bypass recirculates water inside the pump head to hold the line at about 50 PSI. Power it through an external control — a tank float or level switch, a relay, or the controller in your RO system — and do not leave it running against a closed outlet for long periods. If you want the pump to start and stop on its own when a faucet opens, choose one of the pressure-switch models above.
Built for Continuous, Quiet Service
Demand or Delivery Mode
Pressure-switch models run in demand mode on the integral switch, or in delivery mode under an external switching device such as a tank level controller. The bypass-only 5843 runs in delivery mode only.
Self-Priming, Dry-Run Safe
Primes 4.5 to 10.5 feet of lift depending on model and will not be damaged if the tank empties.
Thermal Protection
Built-in thermal protector opens at approximately 145°F motor shell temperature. Most 115 VAC models in this range are rated for continuous operation.
Push-to-Connect Ports
John Guest style quick-connect ports moulded into the pump head — 3/8" on most models, 1/4" on the 5843. No adapters, no tools.
NSF/ANSI 58 Certified
Certified to the reverse osmosis drinking water standard. Nylon housings, EPDM valves, Santoprene diaphragm, stainless fasteners.
Low Pulsation
Three-chamber design keeps pulsation and noise down at the flow rates typical of point-of-use delivery.
Where This Pump Belongs
Installed downstream of a reverse osmosis storage tank to deliver water to a faucet, refrigerator, ice maker, or a second holding tank. Also used to boost a low-pressure supply line, transfer from an atmospheric tank, and feed point-of-use dispensers. Works with 3/8" or 1/4" OD semi-rigid tubing via the integral push-to-connect ports. Suitable for intermittent residential duty or sustained multi-hour intervals in light commercial service.
Before you order: maximum inlet pressure is 60 PSI. Positive inlet pressure adds to discharge pressure for a given flow, so a pump fed from a pressurised line will run above its plate rating. Models with a B prefix in the third block (5852-1E13-B574, 5843-8D02-B574, 5853-1E12-B524) ship without a power cord for OEM integration.
Verified Factory Data
| Pump design | 3-chamber positive displacement diaphragm pump, self-priming, can be run dry without damage |
| Control | Integral pressure switch on all models except 5843-8D02-B574 (internal bypass, no switch) |
| Certification | NSF/ANSI Standard 58 |
| Pump housings | Nylon |
| Valves | EPDM |
| Diaphragm | Santoprene |
| Fasteners | Stainless steel |
| Maximum inlet pressure | 60 PSI |
| Maximum liquid temperature | 170°F (77°C) |
| Weight | 6 lbs |
| Mounting | Steel base plate with four hollow rubber grommets; mounts in any orientation |
| Cycling limit | Maximum 6 starts per minute |
Ships from California
Stocked in Santa Ana and shipped the same business day on orders placed before cut-off.
Genuine Aquatec
Factory parts from Aquatec International, Irvine, CA. No rebranded substitutes.
Sizing Help
Not sure which model fits? Call (877) 541-6603 and we will spec it with you.
