# G green EXPERT Water Sensor Pump 203629, 1/3 HP Submersible Sump Pump Plastic and stainless steel construction suits basement, garage, and hot tub drainage, with manual and water-sensor modes. - [Original product page](https://www.ofertitastop.com/us/product/green-expert-water-sensor-pump-203629) - [View offer](https://www.ofertitastop.com/us/visit/green-expert-water-sensor-pump-203629) - Market: US - Language: en-US - Currency: USD - Product updated: 2026-10-14T18:18:46.925Z - Brand: G green EXPERT - Model: Green Expert Water Sensor Pump 203629 - MPN: Green Expert Water Sensor Pump 203629 - SKU: ofertitastop-us-129080 - Category: Hardware > Hardware Pumps > Sump, Sewage & Effluent Pumps - Source store: amazon US - Active deal: No - Rating: 4.1 / 5 - Reviews: 966 Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store. ## Description The water sensor switch lets this submersible pump run in automatic mode, helping remove standing water without requiring constant manual activation. It can also be switched to manual mode when you want direct control. With a 1/3 HP motor, it is intended for jobs such as draining a flooded basement, garage floor, hot tub, or sump pit. The product information lists a maximum flow rate of 33 gpm and up to 2,000 gallons per hour at zero feet of lift, flow is listed as 22.5 gallons per minute at a 10-foot discharge lift. One practical constraint matters for near-dry cleanup: the base is designed to work on a rigid, flat surface. A soft or flexible pool cover may block the low-level intake, so the product information recommends using a raised filter or strainer cover in that situation. ## Worth noting The pump combines automatic and manual operation, with a water sensor and a non-return valve intended to help prevent backflow. Its low-water design is listed as reaching a suction level of 1/25 inch. In automatic mode, it is described as stopping after 15 seconds when the sensor no longer detects water. Those details make it more specialized than a basic pump that only starts and stops manually, particularly for routine draining where hands-off operation is useful. The included kit contains a lifting rope, a non-return valve, and three multipurpose adapters for hose connections. The product information lists adapters for 1-inch and 1-1/2-inch discharge hoses, as well as threaded garden-hose connections. It also advises against expandable or retractable hoses because they may restrict flow. Buyer feedback is mixed on how consistently the sensor, water flow, and automatic shutoff work. Some buyers praise its drainage and sensor operation, while others describe weak flow or unreliable automatic operation. Reports on durability also vary, so the stated features should not be treated as a guarantee of trouble-free performance. ## Size & fit The pump measures 9.5 inches long by 6.7 inches wide by 10.6 inches high and weighs 3.65 kg. Its listed materials are plastic and stainless steel, and it uses a corded electric power source with a listed voltage of 115 volts. These dimensions are useful when checking whether it can sit securely in a sump pit or on the area you need to drain. The flat-surface requirement is especially relevant when aiming for the lowest possible water level. ## Everyday use For a basement or garage with standing water, the pump can be placed on a firm, level surface and operated manually or with the sensor switch. It is also listed for draining hot tubs, spas, water tanks, pools, cisterns, and window wells. For low-conductivity water such as distilled or purified water, the product information calls for manual mode and monitoring during operation. A solid pick if you want one pump for several household water-removal tasks and value having both manual and sensor-based modes. You may want to skip it if the setup depends on a soft pool cover or on automatic operation you cannot monitor: those conditions are specifically flagged in the product information, and buyers’ reports on sensor reliability are divided. ## Before you decide **Can it run without the automatic sensor?** Yes. The pump offers manual as well as automatic operation, so manual mode is available when you want to control activation yourself. **What comes in the box?** The listed components are the 1/3 HP pump, a lifting rope, a multipurpose adapter kit, and a non-return valve. **Can it remove nearly all the water from a flat floor?** It is designed for low-level drainage, with a listed suction level of 1/25 inch. For best performance, use a rigid, flat surface, a flexible pool cover can obstruct the base. ## Is it worth it? This model’s main buying distinction is the combination of a water sensor, manual mode, and low-water drainage design, rather than a simple manual-only pump. That makes it worth considering for varied household drainage jobs where the surface and hose setup suit its instructions. The mixed reports about flow, sensor operation, and durability are a reason to weigh the convenience of automatic mode against whether you can monitor the pump or use manual operation when needed. ## Images ![G green EXPERT Water Sensor Pump 203629, 1/3 HP Submersible Sump Pump — 1](https://www.ofertitastop.com/i/4LOuD2IW6Vcy7NtakShCrtqZadAVC_x1J5AlHyUJiQrZJ2ZwYimr2zO2KTFiexx6PiEYJsVyYztMJIFq1BLlPlCQdi6CA7rDqgPar4kpVKa8FqivBPwCqXpBrg.jpg) ![G green EXPERT Water Sensor Pump 203629, 1/3 HP Submersible Sump Pump — 2](https://www.ofertitastop.com/i/usTqY93eI9AMEGBm-aTbLop3k6JJmyw7lFiUL4o7Aeg8Xe4oTiL0I0aiWUKU4TFzY8LrjGs9nCIUXgSVNtXVf3YrLV-EnXkuFKoMGo7Nzn8rAzxgK-qFNuSrRQ.jpg) ![G green EXPERT Water Sensor Pump 203629, 1/3 HP Submersible Sump Pump — 3](https://www.ofertitastop.com/i/25kFpJu3z5OvczHgi_0RRvyZAeQYU5i_eAY_nFmq4nz3f0JEk_s0_FQJnphxjwyR0yITyCMeokiAONt5Z69nL2UK4GyIz8a5OCNd_vpq_PJlSrd97stvNM64Fw.jpg) ![G green EXPERT Water Sensor Pump 203629, 1/3 HP Submersible Sump Pump — 4](https://www.ofertitastop.com/i/faH4yo7nzNMxBDhw1cFeKAJK6Dr7HqsBJi78mHvt6DU1FSK6au-ythnRaalIukTNB301Pfb6KTpxGsOTRUXiUd9Zk3zBStOc9rBI-5t0tcsuU7KMCRqFOyM99w.jpg) ![G green EXPERT Water Sensor Pump 203629, 1/3 HP Submersible Sump Pump — 5](https://www.ofertitastop.com/i/yYD3ADamP-Yg0KGL7az9nVGM4dOJag9qJ77GXCqHDfOTJFK5aGMBjdZ8nX0l9qL9IMqYkpSx1qCDFmNFjQRpyKVETMzLBGcA1gQ9fQDQ_aVOUJtjiHQGZ720XQ.jpg)