How long does it take to heat up a 400 gallon hot tub?

For a 400 gallons pool, an 3KW pool heater takes about 3.5h to raise the temperature by 41 degrees ℉. 7.3h to raise the temperature by 50 degrees ℉.

What is the largest size pool it works on?

Hello there, capacity between 250 and 500 gallons is appropriate. Although pools over 500 gallons are available, but the pool heater may not achieve effective heating.

What gallon per hour pump is recommended?

Hi there, it is recommended to use a 1/2 hp water pump with the pool heater.

Will the red light go on if there's no water in it? I want to test it before I run water through it

Hello there, we recommend that you run the water first before starting the pool heater, if you do not run the water to open the heater, the light will be on, but it will dry out. It is not conducive to the long-term use of the item.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Mxmoonant Pool Heater 3KW 220 240V, Electric Hot Tub Heater Water Thermostat with Temperature Control Self Heating for 500 Gals Spa, Bathtub, Swimming Pool (Hardwired)

Product ID: 517195325

⚡3KW high power heating

🌡️Precise temperature control

🛡️Multi-layer safety protection

$413.40

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Description

🔥 Heat your pool smartly, safely, and effortlessly! 🌊

HIGH TEMP SAFETY CUTOFF - Built-in high temperature protection ensures your heater stops at 50°C to prevent damage or hazards.
SMART SELF HEATING CONTROL - Automatically maintains your perfect spa temperature without lifting a finger.
ADVANCED DRY BURN PREVENTION - Pressure switch safeguards your heater by shutting off power if water flow drops dangerously low.
PROFESSIONAL HARDWIRED SETUP - Designed for 220-240V with hardwired installation—ideal for serious pool owners who demand reliability.
UNIVERSAL FIT WITH DUAL CONNECTORS - Comes with two PVC pipe connectors (48mm & 50mm) for seamless integration with your 500-gallon pool or spa.

The Mxmoonant Pool Heater is a robust 3KW electric heater designed for pools and spas up to 500 gallons. Featuring automatic temperature regulation, dry burn prevention, and high-temperature safety cutoffs, it ensures efficient and safe heating. Hardwired for stable power delivery, it includes dual PVC connectors for easy installation, making it a reliable upgrade for any serious pool owner.

Specifications

ASIN	B0BNTB1N8B
Best Sellers Rank	#179,816 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #269 in Swimming Pool Heater Parts
Customer Reviews	3.1 3.1 out of 5 stars (60)
Item Weight	5.46 pounds
Item model number	WJW-2
Manufacturer	Mxmoonant
Product Dimensions	7.56 x 4.72 x 5.51 inches

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

$413.40

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews