DAB Esybox Diver Submersible Pressure Pump - Variable Speed Constant Pressure, 1.3 HP, 31.7 GPM, 180 ft Head, 1-1/4 in NPT, Integrated Tank

The Esybox Diver is a 7 in electronic multistage submersible pump with a built-in variable frequency drive, for clean water in wells, cisterns and tanks. It holds constant pressure, preset at 43 psi and adjustable from 14 to 80 psi, for home pressurization, rainwater reuse, gardening and irrigation. A permanent magnet motor cooled by the pumped water drives three impellers; PowerLine Communication links the pump to the supplied DConnect Box 2 and the H2D app.

• Submerged, semi-submerged or surface: on the surface below the water level with the DOC68 base.
• IP68 throughout: the entire pump, not just the motor.
• DConnect Box 2 included: pressure, alarms and tank level on your phone through the H2D app.
• Adjustable suction height: accessory included, 1.4, 1.6, 2.4 or 3.2 in.
• Built-in protection: non-return, overpressure and air-vent valves, debris filter, dry-run protection and an NFC pocket for a float sensor.

Two identical Esybox Diver units can run as a pair. DAB supports two modes: one pump in place of the other, so water service never depends on a single unit; or the second pump supporting the first when demand is more than one can supply. Both sit in the same tank or well and share the same discharge.

Two Divers hold more pressure at the same flow. Each carries half the water, so each sits higher on its own curve. Read it off the published curve below: 24 GPM from a single Diver comes out at 36 psi; split between two units it comes out nearer 78 psi. The shut-off ceiling at zero flow is unchanged at 80 psi. Maximum two units.

Group figures are read from the published single-pump curve at the flow each pump carries. DAB publishes no combined performance table for the Diver, so size a pair from DAB selection data rather than by doubling the single-pump curve.

How to Connect Multiple DAB Boosters

The figures below are the pressure this pump adds from where it sits in the tank or well. Its head has to lift the water to the highest fixture first, then supply the pressure you want there.

Pressure added in PSI, by flow

Converted from the head DAB prints in feet (PSI = ft ÷ 2.31). DAB also tabulates 4 and 8 GPM; both equal shut-off, because the inverter holds the pressure flat out to 12 GPM.

Read it this way. Set to 50 psi with the tank at the same level as the house, the Diver delivers about 21 GPM. Every 10 ft the water has to climb costs 4.3 psi, so the same 50 psi at a fixture 30 ft above the water needs the pump to add 63 — and the table gives roughly 19 GPM there instead. Height comes off the flow you get, not the pressure you set.

Best operating range: 10 to 16 GPM. This is where the pump turns the most electricity into water pressure. Ask for more flow than it can deliver at your setting and it runs at full speed continuously, which is where motors and seals wear out. Sizing a pump to the house rather than to the headline numbers is what makes it last.

Zero flow is the shut-off point — a ceiling, not a working point. DAB gives the maximum flow as 31.7 GPM, where the head reaches zero; its table ends at 31 GPM. Any set point from 14 to 80 psi is settable below the curve. These figures are at full speed; the drive holds lower pressures by running slower. Feet of head = PSI × 2.31. Best operating range is derived from the published duty points — DAB does not publish an efficiency curve for this model. Curve tolerance to ISO 9906. Source: DAB Esybox Diver Technical Sheet 60191717, AMREG, 2021.

Output in GPM at 30 and 50 PSI set pressure, by lift from the water level

Calculated from DAB’s head-at-flow table (Esybox Diver Technical Sheet, at full speed); DAB publishes no output table for this pump. Each cell is the flow where DAB’s curve meets the lift from the water level plus the pressure (30 PSI = 69 ft, 50 PSI = 116 ft), interpolated between DAB’s printed points and rounded down to 0.5 GPM. — = beyond DAB’s printed range or under 1 GPM. Pipe friction is not included.

Enter your water level, pipe run and pressure. The calculator shows which DAB pumps cover the duty, with the headroom on each.

Residential constant-pressure supply from wells, tanks and cisterns, rainwater reuse and garden irrigation.

From the DAB Esybox Diver Technical Sheet.

This pump connects to H2D, DAB’s official app, which replaces DConnect. The connection runs through the DConnect Box 2 supplied with the pump.

• Free: guided setup, live status and basic parameters, error overview and alarm alerts.
• Free: share an installation with up to 2 users (10 with Premium).
• Premium subscription: change settings and manage the pump from anywhere, full alarm and usage history, data-log analysis and PDF reports.
• H2D Desktop opens the same installations on a tablet or computer.