What is the difference is between standard and stainless steel grates? The side view photos aren't very helpful in determining this.
Hello,
Those products are very similar. There's only slight difference in grating. Standard grate edges are rounded, while Stainless steel has right angles.
Regarding flow rate - we cannot retrieve this information from the manufacturer, however they have like standard 26-32 l/min throughput.
To be honest with you - this type of product is not that popular and I would personally recommend to go for similar, but better Premium drains.
Kind regards
David 020 7193 0953