---
product_id: 43502072
title: "StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit"
brand: "relationshipware"
price: "€ 222.33"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.nl/products/43502072-stratolauncher-iv-ultimate-tilting-water-rocket-launcher-stratofins-kit
store_origin: NL
region: Netherlands
---

# 125 PSI safety Easy assembly 350 ft launch StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit

**Brand:** relationshipware
**Price:** € 222.33
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Elevate Your Playtime with the Ultimate Water Rocket Experience!

## Quick Answers

- **What is this?** StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit by relationshipware
- **How much does it cost?** € 222.33 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/43502072-stratolauncher-iv-ultimate-tilting-water-rocket-launcher-stratofins-kit)

## Best For

- relationshipware enthusiasts

## Why This Product

- Trusted relationshipware brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **🌍 STEM Ready!:** Fully upgradeable for educational exploration and creativity.
- • **🎉 Portable Fun!:** Lightweight design makes it easy to take your launches anywhere.
- • **💧 Safety First!:** Equipped with a 125 PSI safety valve for worry-free launches.
- • **🔧 Assemble with Ease!:** Quick and simple setup for instant fun.
- • **🚀 Soar to New Heights!:** Launches 2L bottles over 350 ft into the sky!

## Overview

The Relationshipware StratoLauncher IV is a high-performance water rocket launcher designed for easy assembly and maximum fun. With a robust 125 PSI safety valve, it propels standard 2-liter soda bottles over 350 feet into the air. The kit includes essential components like StratoFins and a pressure gauge, making it perfect for STEM education and outdoor adventures. Lightweight and portable, this launcher is a must-have for aspiring rocket scientists and thrill-seekers alike.

## Description

Full description not available

## Features

- Easy to assemble metal water rocket launcher with a 125 PSI safety valve. Rocket will NOT fly straight without an aerodynamic nose cone made from a second soda bottle and use only 1 cup (200 ml) of water.
- Kit includes StratoLauncher IV, StratoFins, ball head, pressure gauge, QConnect w/valve (tank not included). Watch assembly video on this listing at the end of the pictures.
- StratoLauncher IV Ultimate will propel a 2 liter plastic (PET) soda pop bottle over 350 ft. in the sky. Watch the last minute of the assembly video for launch procedure.
- Supports most .5L, 1L, 1.25L, 1.5L, 2L soda bottles @ air pressures as low as 15 PSI up to 120 PSI.
- Kit is fully upgradeable, expandable, & can be accessorized into a complete launching system for STEM.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Dimensions | 8 x 7 x 12 inches |
| Unit Count | 1.0 Count |
| Item Weight | 2.88 Pounds |
| Material Type | aluminum, stainless steel, brass, ABS plastic |
| Theme | Rocket |
| Color | Black |
| Toy Vehicle Form | Rocket |
| Are Batteries Required | No |
| Additional Features | Portable |

## Images

![StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit - Image 1](https://m.media-amazon.com/images/I/61NkbLJuD0L.jpg)
![StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit - Image 2](https://m.media-amazon.com/images/I/61RxerjZhRL.jpg)
![StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit - Image 3](https://m.media-amazon.com/images/I/71bCaWObGjL.jpg)
![StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit - Image 4](https://m.media-amazon.com/images/I/61ubuRbSyOL.jpg)
![StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit - Image 5](https://m.media-amazon.com/images/I/61QGBZFLwgL.jpg)

## Questions & Answers

**Q: What is the difference between the deluxe kit and ultimate kit, other than cost?**
A: Both the Deluxe and Ultimate models are exactly the same other than the Ultimate includes 4 additional parts, which can be purchased as an upgrade kit separately if you buy the Deluxe model. These 4 additional parts are a mini ball valve, a Quick Release M Plug, a Quick Release connector, and a 1/4" NPT barbed fitting. This creates the Quick Connect Water Fill System that attaches to an inexpensive 2 gallon tank sprayer, which you would need to buy from a local hardware store. Our water fill system fuels a rocket very quickly yielding about 30 launches with a 2 gallon tank and makes transporting water to the field easy without having to drag additional jugs or bottles of water along. Thank you for asking the question. If you have any more questions, we are happy to provide answers.

**Q: So i see this uses Gardena style nozzles. I know that standard Gardena nozzles do not fit bottles, so where can i get addtional nozzles??**
A: There a few shops online that sells them, you can also 3D print them

**Q: Do I really need the 2gl tank sprayer to properly operate this launcher?**
A: No you do not. If you are doing many sequential launches, it does make it easier/quicker to hook up a tank sprayer to the launcher to fill the rocket. If you are using a tank sprayer, you just lock the empty rocket onto the launcher, turn the ball valve on the launcher to open the water inlet that the sprayer is quick-connected to, and close it when the desired amount of water has flowed into the rocket. If you don't have the sprayer, you just have to fill the rocket each time using the funnel before you place it on the launcher.

**Q: Can I use a higher tank spray?**
A: Not sure what you mean by a higher tank spray, unless you mean a higher than 2 gal. capacity, which is what we typically recommend. If that is the case, than yes you can use a higher volume tank or a taller tank or even a higher pressure tank sprayer. The restrictions are not on the tank sprayer, but on the amount of water that fills the rocket, which should be limited to about 1 cup of water. A 2 gal. tank sprayer will yield about 30 launches. The other restriction would be the max PSI for pressurizing the rocket, which is 120 PSI and the safety valve will release at 125 PSI. I hope this answers your question otherwise please provide more detail when asking your question.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Just AWESOME!
*by M***E on May 30, 2019*

This launcher is super fun. It is very well made with metal components and boy can you get those water bottle rockets launched high! I definitely recommend purchasing additional bottle launch caps from the company as you may lose a bottle or two but this thing is amazing. The hardest part is the workout pumping the pressure into the system. At around 100psi you might never see your rocket again but boy is it worth every penny!

### ⭐⭐⭐⭐⭐ These are the water rockets you're looking for
*by P***N on October 4, 2023*

What you dreamed of as a kid. You'll likely need the kit accessories to properly use the parachute (which is all but needed and tricky without an altitude release), but high-quality build and lots of fun!

### ⭐⭐⭐⭐⭐ Worth every penny...
*by D***R on June 1, 2020*

I wanted something for the grand-kids to enjoy when they visit and they loved it. I was a initially hesitant about laying out $95 but the parts are all high quality. If you have done simple plumbing and adjusted brake cables on bicycles, you won't have any issues assembling it. It's lots of fun. Note: I elected to get a cheap $8 pressure sprayer rather than fiddle with the funnel. Also, make sure you use a good bicycle pump.

## Frequently Bought Together

- Relationshipware StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit
- Relationshipware StratoChute 24" Red Rip-Stop Nylon Parachute for Water or Model Rocket
- StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-25*