12V Water Pressure Diaphragm Pump 3.8LPM 40PSI Self-Priming Water Pump for RV Caravan Marine Camping
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12V Water Pressure Diaphragm Pump – 3.8LPM, 40PSI
Designed for reliable water delivery in RVs, caravans, boats, camping setups and other compact water systems, this 12V diaphragm pump provides consistent water pressure with automatic on-demand operation.
With a built-in 40 PSI pressure switch, the pump automatically starts when water is required and stops when the desired pressure is reached. Its self-priming design allows flexible installation and can operate even when mounted above the water tank.
Key Features
- 12V DC Operation: Suitable for a range of mobile and off-grid water systems.
- 3.8LPM Flow Rate: Delivers up to 1.0 gallon per minute for everyday water supply applications.
- 40 PSI Maximum Pressure: Provides consistent water pressure for suitable low-volume water systems.
- Self-Priming Design: Supports up to 1.2m of suction lift, allowing the pump to be installed above the water tank.
- Automatic On-Demand Operation: Built-in pressure switch automatically starts and stops the pump according to water demand.
- Dry-Run Capability: Designed to operate without water for added installation flexibility.
- Thermal Protection: Built-in thermal protector helps protect the motor during operation.
- Compact Design: Space-saving construction makes it suitable for compact installations.
- Quiet Operation: Designed to provide reliable water pumping with reduced operating noise.
- Standard Mounting Pattern: Suitable for common installation configurations.
Specifications
| Pump Type | 2-Chamber Positive Displacement Diaphragm Pump |
| Voltage | 12V DC |
| Flow Rate | 3.8LPM / 1.0 GPM |
| Maximum Pressure | 40 PSI / 2.8 bar |
| Priming Capability | Up to 1.2m / 4ft suction lift |
| Inlet / Outlet | 3/8 Hose Barb |
| Maximum Recommended Temperature | 43°C / 110°F |
| Weight | Approx. 0.57kg / 1.25lb |
| Power Leads | 18 AWG, approx. 35cm, with 2-pin connector |
| Duty Cycle | Intermittent |
Suitable Applications
- RV and caravan water systems
- Marine and boat applications
- Camping and portable water systems
- Water treatment and RO systems
- Beverage and food service equipment
- Distillation equipment
- Agricultural spraying
- Automotive applications
- General industrial water systems
Package Contents
- 1 × 12V Water Pressure Diaphragm Pump
Note: Please confirm the pump specifications, connection size and electrical requirements are suitable for your intended application before purchase. Product colour may vary slightly due to lighting and screen settings. Manual measurements may have a tolerance of approximately ±1–3cm.
📦 Shipping & Delivery
Free Shipping on orders $500+. For orders under $500, a flat postage fee applies based on order weight (from $4.95).
Orders are dispatched within 1–3 business days of payment confirmation. You will receive a tracking email once dispatched.
Standard delivery: 3–7 business days (metro). Regional/WA/NT may take slightly longer.
🔁 Returns & Refunds
We offer 14-day returns on all items.
To be eligible, items must be returned in original, unused condition with all original packaging.
To start a return: email hello@myhappygift.com.au with your order number.
Refunds are processed within 5–10 business days of receiving the returned item.
🛡️ Warranty
All products include a 12-month manufacturer's warranty.
Covers manufacturing defects and faults under normal use conditions.
Does not cover accidental damage, misuse, or normal wear and tear.
To make a warranty claim, email hello@myhappygift.com.au with your order number and photos of the fault.
❓ FAQs
How long does delivery take?
Orders dispatch in 1–3 business days. Standard delivery 3–7 business days.
Do you ship to all Australian states?
Yes, we ship Australia wide including WA, NT, and all regional areas.
How do I track my order?
A tracking link is emailed once your order is dispatched.
How do I contact support?
Email hello@myhappygift.com.au or call (03) 9961 6069.
Mon–Sat, 9:00 AM – 10:00 PM AEST. We respond within 24 hours.
Are your products covered by warranty?
Yes, every product includes a 12-month manufacturer's warranty.
Curated for Quality
Every product hand-selected to meet our quality standards before it reaches your home
Fast Australian Dispatch
Orders dispatched within 1–3 business days from our Australian warehouses
Responsive Local Support
Australian-based team available Mon–Sat, 9am–10pm AEST. Reply within 24 hours
Backed by Warranty
Every product includes a 12-month manufacturer's warranty — shop with confidence
