Design and materials
The Hydromax 5 is constructed from plastic and measures 26 cm in total length, with an insertable length of 12.5 cm. It's designed specifically for those with an erect penis size of 3–5 inches (7.5–12.5 cm), making it one of the smaller options in the Bathmate range. The clear plastic construction allows you to see inside the chamber during use.
Being water-based, the pump is intended to be used in the bath or shower, where water creates the pressure mechanism. This eliminates the need for batteries, electric motors, or manual hand pumps, which sets it apart from other designs on the market.
How it works
The Hydromax 5 operates by using water displacement rather than mechanical or electrical power. You fill the chamber with warm bathwater, which creates pressure when you position it correctly. The water-based system means there are no moving parts to wear out or batteries to replace.
Because it's designed for use in water, you'll need to use it during a bath or shower. The warm water environment is part of how the pump functions, so this isn't a portable option for use elsewhere.
What to expect
The Hydromax 5 is marketed as producing more power than Bathmate's original series. However, results and experience vary from person to person, and any physical changes take consistent use over time. The pump is described as completely safe to use when operated as intended.
Because you're controlling the pressure manually through water displacement, you have direct control over intensity during each session. There's no preset power level or vibration mode—it's entirely down to how you use it in the water.
Cleaning and care
Since the Hydromax 5 is used in water and is made of plastic, rinsing it thoroughly after each use is essential. You can clean it with warm water and mild soap. Make sure to dry it completely before storage to prevent any moisture from building up inside the chamber.
Store it in a cool, dry place away from direct sunlight. Regular maintenance will help keep the plastic in good condition and ensure the seal remains effective over time.
Buy it if
The Hydromax 5 is a sensible choice if you're within the specified size range (3–5 inches erect) and have regular access to a bath or shower where you can use it comfortably. It's also ideal if you prefer a manual, battery-free option with no electronic components. The clear design is useful if you want visibility during use.
Skip it if
If you're above the 5-inch size range, the Hydromax 5 won't fit properly, and you'd need a larger model from the Bathmate range. It's also not suitable if you can't access a bath or shower regularly, or if you prefer a portable option you can use outside of water. Those looking for an automated or vibrating option should look elsewhere.
The bottom line
The Bathmate Hydromax 5 is a straightforward, water-powered pump for those within its specified size range. It requires no batteries or electricity, is easy to clean, and gives you full manual control. If you fit the size requirement and have a bath or shower where you can use it comfortably, it's a practical choice worth considering. Comparing prices across retailers will help you find the best deal.
Frequently asked questions
Do I need batteries or electricity to use the Hydromax 5?
No. The pump operates entirely on water displacement and requires no batteries, electricity, or manual hand-pumping. You use it in the bath or shower where water creates the pressure.
What size penis is the Hydromax 5 designed for?
It's designed for an erect penis size of 3–5 inches (7.5–12.5 cm). If you're outside this range, you'll need a different model from the Bathmate range.
Can I use the Hydromax 5 outside of a bath or shower?
No, it's a water-based pump and is designed to be used in the bath or shower where water creates the pressure mechanism.
How do I clean the Hydromax 5?
Rinse it thoroughly with warm water and mild soap after each use, then dry it completely before storage. Store it in a cool, dry place away from direct sunlight.
Is the Hydromax 5 durable?
It's made from plastic and is built to withstand regular use in water. Proper cleaning, drying, and storage will help maintain its condition over time.