Expandable Garden Hose
Drip Irrigation System Kit
Hard Garden Hose
Multiple Accessories
In the specifications of TPE (ThermoPlastic Elastomer) expandable garden hoses, the inner diameter (ID) and outer diameter (OD) are the core parameters, which will directly affect the water flow performance, flexibility, pressure-bearing capacity and applicable scenarios. The following is a detailed comparison and selection suggestions for our ID of 6mm, our OD of 9mm, 9.5mm and 10mm:
Parameter | OD 9mm | OD 9.5mm | OD 10mm |
ID | 6mm | 6mm | 6mm |
Hose Wall Thickness | 1.5mm | 1.75mm | 2mm |
Working Pressure Performance | Normal | Good | Better |
The ID is the same (6mm), and the theoretical flow velocity is consistent (Assume the Water Quantity at the same time period is Q, Q=AV, where A is the cross-sectional area and V is the flow velocity). However, we need to consider the aspect of the friction. First of all, we can know the inner A of OD 9/9.5/10mm is same. For the V, the water in the OD 9mm will flow smoothest because of the thinnest wall thickness and minimum friction, and V of the OD 10mm is slowest. In other words, for the Q, OD9mm > OD9.5mm > OD10mm. (But the Q of the 3 ODs are similarly same under the low water pressure.)
For the working pressure performance, the result (based on the wall thickness) is on the contrary to the Q. And the flexibility performance is same logic.
OD10mm ( BEST) > OD9.5mm (BETTER) > OD9.5mm (NORMAL)
Feature | OD 9mm | OD 9.5mm | OD 10mm |
ID | 6mm | 6mm | 6mm |
Max Length | 50FT | 50FT | 50FT |
Weight | Lightest | Lighter | Light |
Usually, the TPE expandable garden hoses is not heavy-duty, but the less material, the lighter weight. This is why the OD 9mm of this hose in the table is lightest, which can be flexibly moved to more places.
Apart from easy-carrying, the TPE expandable garden hose is good at convenient storage. All the 3 ODs are able to save space when store. And theoretically, the bigger OD, the better ability to keep the shape when shrink back to its original length from the Max length.
Application | Suggested ID*OD(mm) | Reason |
Water Plants, Wash Pets and Cars, Cool the Environment, Play with Children | 6 * 9, 6 * 9.5, 6 * 10 | Lightweight, Soft and Easy to Carry |
Water Requirements in a Little Long Distance, Like Clean Dirtier Cars, Rinse Floors/Windows/Walls/Deck | 6 * 9.5, 6 * 10 | Thick Wall Thickness |
Water Requirements with a Little High Pressure and a Longer Distance | 6 * 10 | Thicker Wall Thickness |
The first mistake - “Bigger OD, Faster Water Flow.”
Explanation: The ID is same. And maybe from the theoretical logic, the bigger OD, the slower water flow due to the friction.
The second mistake - “Thicker Wall Thickness, More Congested Possibility.”
Explanation: The congested possibility mainly depends on manufacturing technique, which make the inner wall smooth.
The third mistake - “Thicker Hose, More Durable.”
Explanation: It depends on how we use.
